The Blues have made Rooney their primary transfer target this summer but saw an improved bid rejected by the Premier League champions on Sunday, which is understood to have been worth around £30 million.
And Wenger feels a potential departure for Rooney will have no impact on his team as Chelsea are already one of the strongest outfits in the division.
| TRANSFER TALK
|15/8||Wayne Rooney, Gareth Bale and Luis Suarez are 15/8 with Coral to all move this summer
"I rate Rooney highly and unfortunately we fight with Manchester United and Chelsea.
"So, on one front, if he goes then Manchester United will be weaker, that's quite good for us. But if he changes to Chelsea then they will be stronger - which is not good for us."
David Moyes has continually insisted that the 27-year-old will not be sold this summer despite the player's desire for a fresh start after nine years at the club.
And the new United manager does not think he will have to convince Rooney to stay, despite the continued interest from Jose Mourinho at Stamford Bridge.