Guillermo Coria emulated his namesake Guillermo Vilas by winning the Hamburg Masters on Sunday, outplaying compatriot Agustin Calleri 6-3, 6-4, 6-4 on a memorable day for Argentine tennis.Coria, who was named Guillermo because his tennis-mad parents loved Vilas, won a one-side contest to become Argentina’s first winner in Hamburg since Vilas himself in 1978.“I played my best tennis this week,” said Coria, who dropped only one set on his way to the final. The final crowned a great week for Argentina, who had four players in the semi-finals — the first time in a Masters Series tournament that all the players in the last four were from the same country.“This is great for Argentina,” said Calleri, who fell into the arms of Coria after losing.