Heraldo de Madrid - Zverev 'mentally' affected by Australian Open defeat

The German, who has lost all three Grand Slam finals he has contested in his career, went down in straight sets to Jannik Sinner and has battled to pick himself up since.

"I didn't take a rest after Australia and mentally it affected me a lot," said Zverev at a press conference ahead of the Monte-Carlo Masters 1000.

"I was very upset, I was very tired also."

Zverev's response was to start training again "straight away" and heading to South America to take part in the ATP 250 in Buenos Aires and the ATP 500 in Rio de Janeiro, where he was beaten on each occasion in the quarter-finals.

"I didn't really have time to process what happened," said Zverev who is top seed in Monte Carlo in the absence of Sinner, who is suspended.

"In a way, I just kept going, which was perhaps not the smartest thing to do.

"But tennis is also a business. You have contracts with tournaments that you have to obligate. These contracts are signed six or seven months in advance."

The seven-time Masters 1000 winner also agreed that he was in favour of players receiving a greater proportion of the revenue from tournaments.

Several top 20 players have sent a letter to Grand Slam organisers, requesting a more favourable revenue distribution with Casper Ruud on Thursday calling for a 50-50 split between tournaments and players.

Zverev said that it would "never be shared 50-50" but called for a delegation of top male and female players to "sit around a table" with the Grand Slam organisers and try to find a solution.

"It's no secret, we have the lowest revenue share in professional sport from the Grand Slam side," he said.

"So, we're not trying to say it has to be 50-50 like in the NBA or American sports, but maybe a fair share would be nice.

"I'm sure that we're going to achieve that."

L.Bautista--HdM