- I started to tremble when I had the opportunity but I decided to go for it, not start thinking, says Medvedev after the extremely tight deal in Eurosport.

At 1-1 in the second set tiebreak, Medvedev was ruled out for foot error on his second serve and the Russian made a challenge.

With good will, one could possibly see that Medvedev was over the line by a few millimeters.

Zverev did not want the point

Zverev was in front of the referee - after seeing the replay pictures.

- That is not a foot fault but it should be a second serve, said Zverev who did not want 2-1 in that way.

However, the referee was unimpressed, and booked him for diving.

- Zacha also played well, so I do not want to take it from him.

When I saw the pictures of the foot error, maybe I was over and I might have lost other sets because of it.

But then it was just to let it go and move on, says Medvedev. 

Zverev saved two match balls

Zverev then won the tiebreak 7-3 and forced an arbitration set.

It was almost written that it would be even all the way into the tile and it was.

It was a new tiebreak where Medvedev ended up in a 2-4 disadvantage, which he turned to 6-4 and got two match balls, which Zverev caught up to 6-6 and a new side change.

It was a more relieved than happy Medvedev who thanked the opponent and the referee after the match.

Medvedev has acquired a good position to move on with two initial victories.

Zverev also has a decent position with a win and a loss before the last group game round in the red group.