In the past, Del Potro has always been regarded as a bit of a rabbit on grass, but that all changed at the Olympics last summer. The Argentine powered his way into the semi-finals and only missed out on the gold medal playoff after losing an epic clash to Roger Federer which went down as the match of the tournament. Amazingly, two days later Del Potro returned to stun Novak Djokovic in straight sets and claim bronze.
And he can produce those kind of performances at the Olympics, why can't he reach the last eight at Wimbledon for the first time? He wasn't particularly impressive at Queen's, losing to Lleyton Hewitt in three sets but being a big man, it always takes Del Potro a little while to adjust to the movement.
Ramos is a tricky player on his day but Del Potro gave him no chance, easing through 6-2 7-5 6-1 in the first match of the day on Court One and afterwards he declared himself happy with his tennis.
"I feel okay for be my first round against a lefty player. I think I play okay," he said.
"I made some many, many efforts in the end of the second, and he took the chance to survive in the second set. But in the end I broke his serve again. In the third I play much better, trying to do my game, be aggressive all the time. I think it was a good match for first time."
Del Potro now plays American Jesse Levine in the second round on Thursday. Levine progressed when Argentina's Guido Pella retired deep in the 5th set of their match.