Top quotes from the Australian Open on Tuesday: 
                  
"Less is more sometimes."

- Novak Djokovic on his decision to take a break from training on Monday, after his five-set struggle against Gilles Simon. He returned to beat Kei Nishikori in straight sets.

                
"I like Asian food. I like sushi. I've never met a tennis player that hates sushi. It's weird. It's really weird."

- Serena Williams on fellow players' eating habits.

                  
"I didn't change my coach."

- Agnieszka Radwanska when asked in a press conference why she changed her coach last season.

               
"It's motivating because she's at a different level. She makes you go back to the drawing board, not just for me, but for many other players. She makes you work. That's inspiring."

- Maria Sharapova trying to take the positives out of her 18th straight loss to Serena Williams.

"I honestly have no idea. If I do know it, I'll probably put it in a bottle and distribute it."

- Serena Williams on the secret to her longevity.