Juan Martin Del Potro of Argentina hits a return to compatriot Diego Junqueira during their match at the U.S. Open tennis tournament in New York
Juan Martin Del Potro of Argentina hits a return to compatriot Diego Junqueira during their match at the U.S. Open tennis tournament in New York, September 2, 2011.

Juan Martin del Potro was full of emotions when he received the Citi Open trophy on Sunday, a great sign of things to come for the top-ranked Argentinean tennis player and a gratifying conclusion to the nine-day tournament.

"It's amazing. I'm so happy to win here once again," del Potro said. "Always when you win a tournament, it's special, it's big. And after Wimbledon, to be in my first tournament on hard court, it means a lot."

The seventh-seeded del Potro can't seem to find his rhythm early on in the first set of his championship match against the six-foot ten American tennis player John Robert Isner, who won the set in a score of 3-6.

Nonetheless, momentum shifted for the Argentinean in the second set (6-1), and he carried it over the third set (6-2) to win the championship fight in an hour and 29 minutes.

"In the third, I played my best tennis of the tournament," he said.

With the win, del Potro gained his 15th career title and should definitely move closer in terms of world rankings within the top five spot on tennis.

Del Potro said his win in the Citi Open gives him a lot of confidence boost heading into the Rogers Cup in Montreal, his next stop for tennis matches.

"That gives me big confidence to keep trying and getting closer to the top guys," he said.

Del Potro currently stands in second place behind Isner in the Emirates Airline US Open Series Bonus Challenge and seventh behind Tomas Berdych of Czech Republic.