Alexander Zverev says he needs to work on his focus during matches if he is to fulfil his obvious potential.
Zverev lost his first Grand Slam final last month at the US Open despite being two sets up in the final against Dominic Thiem.
That frustration still seemed to be palpable with him when he was asked what he needs to work on to improve his game.
“I have got to do a better job of keeping my focus until the end of a match," Alexander Zverev told reporters at the HULKS Indoors in Cologne.
"Playing on the ATP Tour, you only play great matches. Once you lose your focus, it does not matter how many titles you won, you have still got to play until the end otherwise it can go the other way very quickly."
Zverev had no problems keeping his focus in the Cologne semi-finals on Saturday, as he beat Alejandro Davidovich Fokina 7-5, 7-6 (7-3) in just under two hours.
"Alejandro played much better tennis and I think he is somebody who is going to go up the ATP Rankings very quickly.
"For me he is a great guy as well. He is very talented, extremely good with the hands.
"I think he is somebody who is going to find his way up and it’s going to be interesting to see what the future weeks hold for him this year and next year as well."
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