Bernard Tomic should be applauded for his honesty not ostracised, says former world No.1 Mats Wilander.

The Australian has been hit by a barrage of criticism for saying he was bored during his first-round loss at Wimbledon after a lacklustre 6-3 6-4 6-3 defeat by Germany's Mischa Zverev.

"It's a roller-coaster and I just can't seem to find the commitment to work hard, to enjoy, and to lift trophies," Tomic told reporters after the loss. "The last two years, nothing motivates.

"Wasn't mentally and physically there to perform. I don't know why, but I felt a little bit bored out there to be completely honest with you."