Vasek Pospisil hits a forehand against Juan Martin Del Potro (not pictured) on day three of the Miami Open at Crandon Park Tennis Center. Pospisil won 6-4, 7-6 (7).Geoff Burke
Vancouver's Vasek Pospisil defeated Argentina's Juan Martin del Potro 6-4, 7-6(7) on Thursday afternoon at the Miami Open.
It took Pospisil nearly two hours to earn his first win at the Miami event.
Pospisil claimed a key break with del Potro serving for the second set at 5-4. He again escaped trouble by saving two set points in the tie-break before closing out the match.
Del Potro, ranked No. 616 in the ATP Rankings, played just four tournaments in 2014 before undergoing surgery on his left wrist last March.
The 24-year-old Pospisil will meet No. 9 seed Grigor Dimitrov in the second round.