# 4 Juan Martin Del Potro
The Argentine is a big threat to every opponent because of his reputation as a giant killer. Del Potro surely has the ability to outlast any opponent with his powerful serve and rapid groundstrokes. His electric forehand is considered the best, which he often executes with speed and accuracy.
The 2009 US Open Champion can also generate a lot of speed with his destructive baseline strokes. His return to the sport last year from a career-threatening wrist injury wasn’t that impressive but Del Potro is slowly coming into his groove. He won the Mexican Open in February and the Indian Wells Masters in March this year.
He finished runner-up in the Auckland Open in January. The Argentine was always billed as the most promising talent but his struggles with injuries have always created hurdles in his progress. The 30-year-old can take heart from the act that he had won the 2009 US Open which can act as a morale booster for him and which might inspire him to do well in the upcoming US Open tournament.