3:00 PM ET Kei Nishikori ended top seed Dominic Thiem‘s Erste Bank Open hopes and boosted his own chances of making the ATP Finals in London. No. 5 seed Nishikori defeated Thiem 6-3, 6-1 in Vienna to advance to the semifinals, where he will face Mikhail Kukushkin. With his victory Friday, Japan’s Nishikori moved above

6:04 AM ET The ATP is to introduce a new video review system at the Next Gen Finals in November which will allow players to challenge incidents such as doubles bounces and foul shots. The video review, which is powered by the same Hawk-Eye technology used to determine whether a ball is in or out,

4:03 PM ET Roger Federer recovered from a slow start to beat Jan-Lennard Struff 6-3 7-5 and reach the quarter-finals of the Swiss Indoors, his hometown tournament, on Thursday. The top seed was broken in the second game of the second-round match by the big-serving German but, after going 3-1 behind, the 37-year-old hit back

1:08 PM ET Caroline Wozniacki revealed Thursday at the WTA Finals that she was diagnosed with rheumatoid arthritis before the US Open. “In the beginning, it was a shock, just, you feel like you’re the fittest athlete out there, or that’s in my head, that’s what I’m known for, and all of a sudden you

7:01 AM ET Associated Press SINGAPORE — Karolina Pliskova won the first set to eliminate Petra Kvitova, and then won the second set to advance to the semifinals at the WTA Finals. Pliskova, who advanced from her group for the second straight year, beat Kvitova 6-3, 6-4 on Thursday to improve her record to 2-1

4:57 PM ET Grigor Dimitrov‘s poor run of form continued as he was dumped out of the Erste Bank Open in Vienna. The world No. 10 has failed to progress beyond the second round of any tournament that he has participated in since being beaten in the opening round of the US Open in August,

11:37 AM ET Associated Press SINGAPORE — Angelique Kerber held her nerve and held her serve, a combination that helped the Wimbledon champion beat Naomi Osaka 6-4, 5-7, 6-4 on Wednesday at the WTA Finals. Kerber saved 13 of the 18 break points she faced, including five in the final game of the first set,

5:37 AM ET Home favourite Dominic Thiem is through to the second round of the Erste Bank Open 500 in Vienna. The top seed was in confident form hitting seven aces against Belgian Ruben Bemelmans on his way to a 7-5, 7-6 (5) victory. Thiem will next play American Sam Querrey, who came through a

4:18 PM ET Associated Press Roger Federer was tested by Filip Krajinovic before winning 6-2, 4-6, 6-4 in the first round of his hometown tournament Swiss Indoors Tuesday. The top-seeded Federer seemed in control after winning seven straight games to take the first set and lead by a break in the second. The 35th-ranked Serb

11:25 AM ET Associated Press SINGAPORE — Defending champion Caroline Wozniacki earned her first victory at this year’s WTA Finals, beating Petra Kvitova 7-5, 3-6, 6-2 on Tuesday. Wozniacki, who became the first Danish woman to win a Grand Slam title at this year’s Australian Open, is now 1-1 in her group. Kvitova is 0-2.