MASON, Ohio -- Angelique Kerber has Serena Williams within arms reach, and shes trying not to think about it.Kerber advanced to the Western & Southern Open semifinals Friday, staying on track to overtake Williams at No. 1. She overcame a sloppy first set and beat Carla Suarez Navarro 4-6, 6-3, 6-0.If Kerber wins the tournament, shell move ahead of Williams in next weeks WTA rankings. Williams has been No. 1 for 183 consecutive weeks, the second-longest such streak. She is the two-time defending champion but withdrew because of a sore shoulder.And now, she could wind up getting passed by Kerber, who doesnt want to put any more pressure on herself.Of course, everybody is asking me this question, Kerber said. And yeah, lets see what happens in the next weeks or next days. When the time is ready, maybe I can reach the No. 1 (ranking). Still, its a long way. Its closer than a few days ago when I sat here.In the mens bracket, Andy Murray struggled with a stiff back and gritted out a 6-4, 6-4 victory over Bernard Tomic to reach the semifinals and extend his successful summer, which includes his second Wimbledon title and another Olympic gold medal. He has won his last 21 matches, a career high.I think its just fatigue, really, Murray said. I have played a lot of the matches in a short space of time, and also theres been a change of surface as well. It does put a little bit more stress on the joints, the hard courts. Yeah, just accepting it for what it is. Ill be fine. I just need to work through it and accept it.Murray is the only player in the tournament who has won a Cincinnati championship, taking it in 2008 and 2011.Kerber has reached the finals in Cincinnati once before, losing to Li Na in 2012. She was in trouble after a sluggish opening set on Friday -- 17 unforced errors -- but took control early in the second set. She had only seven unforced errors in the final set.Kerber will play third-seeded Simona Halep, who beat Agnieszka Radwanska for her 13th straight match victory. Kerber beat Halep in the quarterfinals at Wimbledon. Halep has reached the finals in Cincinnati once, losing to Williams in 2015.Karolina Pliskova also advanced with a 6-3, 4-6, 6-2 win over Svetlana Kuznetsova. Shell face Garbine Muguruza, who beat qualifier Timea Babos in straight sets.The mens bracket was wide open with the top players missing. Top-ranked Novak Djokovic and defending champion Roger Federer skipped the tournament because of injuries. Rafael Nadal is still getting back into playing shape after a wrist injury cost him two months and was knocked out of the tournament Thursday.Murray is the only member of the Big Four still left, but hes running on fumes. He won the gold medal at the Olympics in Rio de Janeiro on Sunday, flew to Cincinnati and reached the quarterfinals despite a worn-down body and a nagging head cold.On Friday, he reached for his stiff lower back after chasing a ball in the first game of the match and favored it throughout the set. He moved much better around the court in the second set, broke Tomic to go up 5-4, and served it out.Tomic fell to 0-17 against players ranked in the top four. Hes 0-5 career against Murray, failing to win a set.Murray will face Milos Raonic in the semifinals. One of the Big Four has won 54 of the last 58 Masters events.The wide-open tournament provides a chance for someone like the unseeded Grigor Dimitrov to win a Masters title. Dimitrov reached the semifinals of a Masters event for the third time, beating top American Steve Johnson 7-6 (8), 6-2.I mean, Im hoping Im going to be playing here on Sunday, Dimitrov said.Despite the loss, Johnson will become the top American in the ATP rankings next week. John Isner has held the top spot since July 29, 2013. Dimitrov will play Marin Cilic, who reached his first Masters semifinal when 19-year-old Borna Coric retired after losing the first set. Coric played the set with both knees taped. Cheap Fake Air Max 95 . Self was acquired from the Buffalo Bandits in a trade for Alex Hill midway through last season, and made his debut in Rochester on March 16, 2013. Yeezy Replica Cheap . 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. http://www.fakeyeezyscheap.com/wholesale-yeezy-boost-350-v2.html . Bjorn, who had a 36-hole total of 8-under 134, made a testing six-foot putt to save par on the 16th and a birdie on the 17th before bogeying the final hole after a misjudged approach shot. American Kevin Streelman was in second place after shooting a 69. Wholesale Under Armour Shoes China . After a replay, the winner will meet Sunderland in the quarterfinals. Sagbo did well to control Sone Alukos right cross and fire past Brighton goalkeeper Peter Brezovan. Aluko was making his first start in four months after recovering from an Achilles injury. Yeezy Boost 350 China . Fellow centre Pavel Datsyuk remains out because of a concussion. Zetterberg has 11 goals and 19 assists for a team-high 30 points, and Datsyuk has a team-high 12 goals and 11 assists. Bundee Aki has edged closer to Test rugby with Ireland by rejecting a move to France to sign a new Connacht deal until 2020.Irelands highly-promising lock Ultan Dillane has also completed a two-year contract extension to remain at Connacht, in a big double-boost to boss Pat Lam.Auckland-born powerhouse Aki is understood to have rejected moves to Bordeaux and Munster, and will now qualify for Ireland on residency next year.Dillane is also thought to have fielded interest from Munster, but two of Connachts key stars have instead opted to remain with the reigning Guinness PRO12 champions.Im really pleased that Bundee and Ultan have committed their futures to Connacht Rugby, said head coach Lam, admitting both stars had fielded offers to move elsewhere.Two talented rugby players, naturally their performances have attracted a lot of attention and there is no doubt that they had options in terms of where they could play.But I believe it is a massive statement about what we are doing here as a team and an organisation that they were both so determined to continue to play their part.Former Chiefs centre Aki has lit up Connachts back division with his powerful line-breaking instincts since his 2014 arrival.The 26-year-old will add a bullish midfield edge to Irelands Test options once available next year after completing the three-year residency period.Home grown 22-year-old lock Dillane already boasts six Irelannd caps after bursting onto the senior scene in the last 18 months.ddddddddddddhe physical second row adds an extra dimension around the park to both Connacht and Ireland, and has now extended his stay at the Sportsground until 2019.Both Bundee and Ultan made it clear from the start that they were keen to stay and play their rugby with Connacht, said Connacht CEO Willie Ruane.They are truly committed to the overall vision for the province and their signatures are a big boost to the future of Connacht Rugby.Were delighted, for the two players and for our supporters, to be able to share this news.Aki insisted he now calls Connacht home after two years in the west of Ireland.The last two years with Connacht Rugby have been incredible, said Aki.I moved over here not really knowing what to expect but this place has become home to me and my family now.I am proud to be part of this Connacht team and Im excited to see what we can achieve together.Academy graduate Dillane admitted his eagerness to repay Connachts faith in guiding him through their ranks.Connacht Rugby has given me so many opportunities since I started in the academy and Im delighted to have signed on again, said Dillane.I am enjoying my rugby so much here and am excited about the future of this team and the province. 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