Fifth-seeded Paes and Stepanek, the Australian Open champions, were level at 6-6 in the first set when Lopez called it a day after needing treatment on his left calf.
They will face either second-seeded Americans Bob and Mike Bryan -- the champions in 2005, 2008 and 2010 -- or the Pakistan-Dutch pairing of Aisam-Ul-Haq Qureshi and Jean-Julien Rojer in Friday's final.
"I feel sorry for Marc. We all come here to entertain you and they are great guys," said Paes.
"I have a great partner. He really pushed me today and pulled the whip out, which is probably what I needed. We are looking forward to the final."
Lopez's injury will be a worry for Spain ahead of their Davis Cup semi-final against the United States in Gijon from September 14-16.
The champions have already lost top singles player Rafael Nadal, who will miss the tie with a knee injury.
Comments
Add new comment