Nick Kyrgios wins in Savannah, claims back-to-back Challenger events

Canberra tennis star Nick Kyrgios has celebrated his 19th birthday in style, coming from a set down to win the Savannah Challenger in the US on Monday morning and further bolster his claims for a French Open wildcard next month.

But a slight adductor strain could force him to miss his next tournament, the Tallahassee Challenger that starts on Tuesday.

He beat American Jack Sock 2-6, 7-6 (7-4), 6-4 to make it back-to-back titles after winning the Sarasota Open last week.

Kyrgios struggled with his serve early, and had three double faults in the first set, but slowly got one of his biggest weapons going as the match wore on. He is on the comeback trail from an elbow injury and has returned firing by winning both his events on the US clay.

Despite his slight injury, he still hopes to be ready for Tallahassee, where he's drawn Ireland's James McGee in the first round.

"Awesome couple of weeks, nice rewards for the whole team and our hard work," Kyrgios tweeted after the win.

"Couldn't have asked for much more. Nice B'day pressie too!!

"I have a slight abductor (sic) strain which is painful, but I hope to be OK for Tallahassee next week so I can keep this run going."

The win firms Kyrgios' chances of getting a wildcard for Roland Garros and a return to the stage where he beat former world No.8 Radek Stepanek in the first round on debut last year.