World number one Andy Murray says Grand Slams face a "different decision" from smaller tournaments when it comes to giving Maria Sharapova a wildcard.
Sharapova, 30, needs an invitation to compete at this month's French Open after defeat in the Stuttgart Open semi-finals at the weekend.
The tournament was the Russian's first since serving a 15-month doping ban.
"Loads and loads of press went there to cover the event - whereas the Slams don't need that coverage," said Murray.
"It probably doesn't change their event much either way, so they have a different decision to make.