Jannik Sinner said his ability to hang in during tough moments was the key to his 3-6, 6-3, 7-5 victory over Alexander Zverev in the final of the ATP 500 Erste Bank Open in Vienna on Sunday.
    The 24-year-old Italian prevailed despite having trouble with severe cramp in the first set and the decider.
    "It was such a difficult start in this final for me," said the world number two.
    "I went a break down, had some chances in the first set but couldn't use them.
    He was serving very well, but I just tried to stick there mentally and play my best tennis when it came.
    "The third set was a bit of a rollercoaster, but I was feeling the ball very well at times, so I tried to push and I'm very happy of course to win another title.

It's very special.
    "It was very difficult of course.
    "The most important thing was to not give up and try to stay there.

Try to see what the situation was.
    "I just tried to make the right choices at the right time. I think that was the key today.
    "Serving well and saving energy in my service games was important too."
   

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