Novak Djokovic of Serbia reacts after defeating Jo-Wilfried Tsonga of France in their men's singles tennis match at the Wimbledon Tennis Championships in London, June 30, 2014. [Photo/Agencies]

Asked whether he spoke with officials, Wawrinka said: "They just say what's going to be the schedule and that's it. Even if you want to talk to them, they're not going to change anything. They don't listen (to) the player. They just do what they think is good for them."

All-England Club spokesman Johnny Perkins said the process was explained to Wawrinka's coach, including that having past major champions on larger courts is more of a priority than getting all matches completed on a given day.

The start of Week 2 at Wimbledon is called "Manic Monday," because it usually has all 16 fourth-round matches after taking Sunday off.

"I understand why Wawrinka was complaining, because we have this tradition here of the middle Sunday. ... We have to rethink (that)," Djokovic said. "We all know that tradition is something that is nurtured here ... and we respect that. But there are some rules that I believe should be updated."

Wawrinka will be on No 2 Court on Tuesday - when, by the way, the forecast calls for a slight chance of rain - against No 19 Feliciano Lopez, who eliminated the last American singles player, No 9 John Isner, 6-7 (8), 7-6 (6), 7-6 (3), 7-5. It's the first time in 103 years that no US men or women reached the round of 16 at Wimbledon.

Like Wawrinka, Isner didn't take well to having his match postponed. He tried protesting, to no avail.

"They had their reasons," Isner said.

Maria Sharapova never got a chance to play at all Monday, because her fourth-rounder against No 9 Angelique Kerber was postponed. That was rescheduled for Tuesday, and the winner must play Wednesday against No 13 Eugenie Bouchard, the first Canadian in the Wimbledon quarterfinals in the 46-year Open era.

These quarterfinals are set: Murray vs No 11 Grigor Dimitrov, and Djokovic vs No 26 Marin Cilic in the men's bracket; 2011 champion Petra Kvitova vs Barbora Zahlavova Strycova, and No 22 Ekaterina Makarova vs No 23 Lucie Safarova in the women's.

Bouchard advanced with a 7-6 (5), 7-5 victory over No 25 Alize Cornet, the Frenchwoman who beat Serena Williams.

"I believe in myself. Every match I play, I believe I can win," said the 20-year-old Bouchard, the only woman who was a 2014 semifinalist at the Australian Open and French Open. "I've proved to myself I can play on the big stage."