Nishikori beats del Potro to reach Citi Open quarterfinals

Nishikori beats del Potro to reach Citi Open quarterfinals

Third-seeded Milos Raonic, the 2014 Citi Open champion, won a lengthy first-set tiebreak on the way to beating Marcos Baghdatis 7-6 (7), 6-3, and eighth-seeded Jack Sock beat fellow American Jared Donaldson 7-6 (6), 6-2.

Anderson saved a match point before dispatching the World No 7 6-3, 6-7 (6/8), 7-6 (9/7) in a thriller that lasted two hours and 46 minutes. The Indian star came up with some scintillating returns to get the Washington crowd rally behind him.

Sock will face Kevin Anderson for a place in the Washington final after the South African ended plucky Yuki Bhambri's interest in the competition.

Ranked 200th in the world, Bhambri had previously defeated world no. 22 and defending champion Gael Monfils and Argentina's Guido Pella in the second and third round respectively to reach the quarters - his career-best run - of the ATP 500 event.

Anderson and Bhambri have never faced each other before.

Thiem staved off defeat the first time after an 11-stroke rally culminated with a whipped forehand victor into the corner that Anderson could only watch helplessly as it whistled past.

Anderson didn't want to waste a challenge over the call though and Thiem would concede the point.

" I have practiced with him before but that was a few years ago".

But Thiem sent a backhand wide on the penultimate point and Anderson blasted an ace wide to reach his fourth Washington quarter-final, matching his best result. Anderson broke back for 5-5. But most importantly I was able to get the win and give myself a shot at the title tomorrow.

Friday's Citi Open quarterfinal matches features both day and night sessions and there definitely will be drama on display.