Roger Federer has said that playing under the roof at Wimbledon may help to level the playing field.
The Swiss player battled back from two sets down to triumph over Julien Benneteau at SW19 last night, with the roof having been closed all day due to forecast rain.
Federer said that playing indoors on grass presents a unique set of challenges.
"It does play different indoors," said Federer. "Obviously that's a bit of getting used to. Indoor grass is not something we're quite familiar with. You just don't have the elements. You just don't have the sun setting, which can be tricky at times.
"I don't know if it would've favoured me or not even more so, but it changes everything. So then does it play slower indoors? I would think so, a little bit, right?
"But then at the same time, you can really play yourself into a trance-like state like I thought Rosol was in in the end of the fifth. That's harder to do outdoors with the elements."
The six-time champion will face Xavier Malisse in the next round.
