The air went out of the WTA balloon shortly after the US Open, when Serena Williams announced that she would play no more tour events until the WTA Finals in Singapore. The decision all but conceded the prized year-end No. 1 ranking to the woman who deposed Williams at the top, No. 1 ranked Angelique Kerber.Now the balloon is inflated again, and dancing in the breeze, thanks to Kerbers failure to clamp down on her rivals in the weeks since the US Open.Had Kerber improved upon her solid but unspectacular results of last year this fall, she would be in position to clinch the top spot for 2016 before the start of Singapore. It was a reasonable assignment for a newly empowered player who took a quantum leap in 2016, winning two Grand Slam events. But Kerber faltered. Shes now involved in a two-person race with a rival whos still relaxing back home.Kerber will lose ground (95 points) when the rankings are issued Monday, because she was beaten one round sooner this year than last in Beijing. She will have 8,390 points, a lead of 1,340 points. The undefeated winner of the WTA finals earns 1500 points, so Williams clearly will have a shot to displace Kerber because she has no points to defend, while Kerber can add points but also has some coming off as the weeks end.As of now, Kerber could lose the coveted top ranking on the last day of the WTA season. In fact, right now she could only lose it on the final day of play in Singapore, as Williams would need to make at least the final to regain No. 1.Stranger things have happened. Remember, this is Serena Williams we are talking about.In fairness, Kerber hasnt found much favor with the draw gods this fall. She took a bruising, three-set third-round loss against Petra Kvitova in Wuhan just as the Czech was roaring back from her recent slump. In Beijing, Kerber was knocked out in the third round as well, this time by emerging giant killer No. 19 Elina Svitolina. The erratic but dangerous 22-year-old Ukrainian also bounced Williams from the Olympic Games a couple of months ago.Williams certainly has faced challenges comparable to this one. You can be sure Kerber is already hearing footsteps, and thats not going to make her life any easier at the final tournament on her schedule next week in Hong Kong. She was a finalist there last year, so shell have to win the event outright in order to add insurance points to her ranking.Kerber can add 100 points if she wins Hong Kong, which will also feature Venus Williams, Caroline Wozniacki, Sam Stosur and Alize Cornet. Anything less than a final for Kerber and she loses points with Williams gaining some precious breathing room.The current ranking system can actually give players a delayed reward for poor performances. Kerber has never made it out of the round-robin portion of the WTA Finals in three trips (shes won just two single matches). Last year, she won one match and will be defending just 370 points.No matter how you cut it, Williams has very little wiggle room -- but there is room after the latest turn of events in Beijing.Williams decision to return for the WTA Finals always seemed more like a tour-related obligation rather than a legacy-building opportunity. Had Kerber clinched the top ranking, Williams might have gone into the finals relaxed and happy to hit a few balls and pick up a kings ransom in prize money. After all, she left the tour in order to get healthy for 2017, not to train like mad to make a final push at Singapore. Its also clear that Williams has been enjoying life, as her Twitter feed and videos -- like the most recent one of her salsa dancing -- confirm.But if she goes into the WTA Finals with a chance to win back the No. 1 ranking, the vibe in Singapore changes. The tournament will matter. Whether Williams likes it or not, Singapore becomes the third potential showdown on a big stage with Kerber. Then the question becomes, how prepared is Williams?Thats where the difference in their WTA Finals records might come into play. Williams is 29-6 (five titles), while is just Kerber, 2-7. But given Kerbers lead in rankings points, even that might not be enough. Wholesale Custom NFL Jerseys . Jordan Lynch, the all-purpose Heisman Trophy finalist from Northern Illinois, failed to make it into that exclusive club. Discount Custom Nike NFL Jerseys . -- Matt Ryan needed one of the best games of his career to lead the Falcons and their depleted offence out of their three-game losing streak last week. http://www.customjerseysnfl.com/ . Collaros, 25, was solid last season, posting a 5-2 record as the starter while incumbent Ricky Ray was injured. Collaros also started Torontos 23-20 regular-season finale loss to Montreal — Ray didnt dress because the Argos had already clinched first in the East Division — but was one of three quarterbacks to play that day. Cheap Custom Jerseys Online . The No. 1-ranked Nadal tweaked his back warming up for the Australian Open final, which he lost almost four weeks ago in a major upset against Stanislas Wawrinka. His first stop after the layoff is the clay in Rio as he tests the back and tries to stay healthy for the French Open in three months. Wholesale New Orleans Saints Jerseys Custom . -- On the field, it was business as usual for Jameis Winston and No. Cincinnati Bengals wide receiver A.J. Green significantly hurt his hamstring in the opening minutes of a loss to the Buffalo Bills, the most notable injury on a Sunday when plenty of big-name players were sidelined.Green got his right foot caught awkwardly while trying for a contested catch on Cincinnatis first pass of the game. Green grabbed his right hamstring as he hit the ground and stayed down for several minutes.Green barely bent the leg as he was helped to the sideline and then taken off on a cart. Bengals coach Marvin Lewis had no details on the extent of the injury, but it seems Cincinnati may be without its star receiver for the foreseeable future.The Bengals-Bills game included plenty of other injuries to major players.The Bills lost two of their top offensive players in the first half: receiver Robert Woods injured his knee being tackled after a catch, and LeSean McCoy hurt his left thumb late in the second quarter. Its unclear how long each will be sidelined.A left knee injury knocked Bengals cornerback Dre Kirkpatrick out of the game, too.Chicago Bears rookie linebacker Leonard Floyd had the days scariest injury. The first-round draft pick from Georgia left on a stretcher with less than six minutes remaining in a loss to the New York Giants.Bears coach John Fox said Floyd injured his neck. The team said Sunday night that Floyd was released from the hospital and returned to Chicago.Some of his movement looked good or encouraging, but hes going through the necessary tests, Fox said after the game. It appeared it was on a tackle. Im sure they are evaluating him for a concussion as well..ddddddddddddAnytime they bring the cart out and the board out, they have some neck concerns. He seemed to have pretty good movement skills at that point.The Bears also lost tight end Zach Miller to a foot injury after he caught three passes for 61 yards, including a 19-yard touchdown. Defensive back CreVon LeBlanc is in concussion protocol, and left guard Josh Sitton injured his right ankle.The Philadelphia Eagles lost two of their top running backs as Ryan Mathews (knee) and Darren Sproles (ribs) were both knocked out of their game with Seattle.The Seahawks also lost an emerging contributor when running back C.J. Prosise went down with a shoulder injury. The rookie had 66 yards rushing and 87 receiving in a surprising win over New England last week, then had a 72-yard run before exiting Sunday.Kansas Citys Dee Ford injured his hamstring and didnt play in the second half of the Chiefs loss to Tampa Bay. Ford had entered the game with 10 sacks this season.Tampa Bay cornerback Brent Grimes injured his quadriceps and didnt return.Jacksonville Jaguars tight end Marcedes Lewis (calf), running back T.J. Yeldon (ankle) and left guard Patrick Omameh (foot) also got knocked out of action Sunday.Jaguars quarterback Blake Bortles left briefly in the first half with a shoulder injury. Backup quarterback Chad Henne entered and took a knee to end the first half, then Bortles came back for the start of the second half.---AP NFL website: www.pro32.ap.org and http://twitter.com/AP-NFL ' ' '