Andrey Rublev says the difference between Novak Djokovic, Rafael Nadal, Roger Federer and the rest of the top 20, is their mental stability.
Rublev, is having an impressive season so far. He won all of this singles matches to help Team Russia win the ATP Cup, reached the quarter-final of the Australian Open then won the ATP 500 in Rotterdam.
He followed that up by reaching the semi-finals in Doha and Dubai and last week reached his first ever Masters 1000 final in Monte-Carlo which has moved him up to a career high of 7th place ranking.
However, after losing the Monte-Carlo final to Stefanos Tsitsipas, the Russian talked afterwards about how he must learn to control his emotions on court.
This week Rublev is playing in Barcelona, and although he won his first round match against lucky loser Federico Gaio, he appeared once again to be unsettled on court an admitted afterwards to feeling 'angry.'
Now Rublev has admitted that he thinks this is the difference between the big three of Djokovic, Nadal and Federer and other top players like himself.
"If we look at who is in the top-20, what are the differences between them and the top three or four?, said Rublev.
"Everyone is capable of playing great tennis, at a great level, but these players have a better mentality. They are more stable and thus are able to win more games and do better."
Rublev managed to beat Rafael Nadal, one of his self-confessed idols in Monte-Carlo, in the quarter finals and said afterwards it didn't feel real.
"It seemed unreal to me. If we talk about level, beating him or Federer is an achievement."
When asked about his goals for the season and how he can improve, Rublev came up with a list of things he wants to work on.
"The goal is the same as always. Do your best. Having the feeling that you couldn't have done anything else. Be it in the first round, second, quarters or semis," said Rublev.
"My goal is simple, to improve as much as I can. There are many things that I can do better.
"I can hit better, volley better, serve better, defend better. I can improve physically and mentally. I think it is positive that there is a lot to improve."
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