Nishikori happy with Washington victory

Roger Federer shows off his effortless skills

Japan's Kei Nishikori was thrilled after winning the Citi Open title in Washington on Sunday after beating American John Isner in the final. 

The second-seeded Nishikori beat Isner 4-6, 6-4, 6-4 to win his third title of the year.

"It's been an amazing year so far," the 25-year-old Nishikori told reporters afterwards.

 "I've had some good grand slams, too." Nishikori lost to Marin Cilic in the final of last year's US Open.

"I'm playing well and I'm looking forward to keeping it going at the US Open," he said.

After losing the first set to Isner via a service break late in the first set, Nishikori got the second set off to the perfect start by breaking the big-serving American immediately and going on to win the second set.  

He was always in control thereafter playing more consistently and in the end thoroughly deserved the win.

"It's never easy against big servers," said Nishikori.

"John, he's not just a big server, but he can come in and he has a great forehand. 

"It was a close match, but I'm happy to avenge last year's loss," he added.

At last year's event Isner beat Nishikori in the quarter-finals. 

The win lifts Nishikori one place in the rankings from five to four, replacing Switzerland's Stan Wawrinka while there are no other changes with Serbia's Novak Djokovic still well in control on top of the standings.