Wenger has still never beaten Mourinho in 10 previous Premier League matches and his team have not overcome Chelsea in the league since October 2011, when Andre Villas Boas was in charge at Stamford Bridge.
Last month, however, Arsenal won 1-0 at Wembley in the annual pre-season joust between the FA Cup winners and league champions.
"What's important is that Arsenal win games and it can sometimes be a mental block for the players when one team doesn't manage to beat a team, so on that front it was good," he told a news conference.
The Frenchman declined to shake hands with his opposite number after that match but was reluctant to discuss whether he would do so at Stamford Bridge on Saturday.
"Look, too much attention is paid to it. People come to football to watch football - everything else is secondary," he said.

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