"The spectators want a bit of rallying, a bit of tactics. People don't go to Barcelona's stadium to watch Lionel Messi taking penalties," Toni Nadal was quoted as saying in Spanish sports daily As.
"This year everything is a bit quicker, that's my feeling and also Rafa's.
"I don't know if it's because of the courts or the balls, which I think have been changed, but I don't think it's good for the spectacle," he added.
Nadal, who won his sole Australian Open crown in 2009, plays his first-round match against local hopeful Bernard Tomic on Tuesday.
"Rafael is coming into this tournament in Melbourne at a good level after winning the title in Doha," Toni said.
- Sports & Recreation
- Toni Nadal
- Roger Federer
- Lleyton Hewitt
- Lionel Messi