Update on his ATP profile - his coach is Djordje Najdanov.
* And he takes the first set 6-2 after saving a break point with two aces in a row.
Yeah, that's how it was, saw it. Just checked this match stat on ATP and it shows 0 aces
Also, as MaratPure wrote
, second set score vs. Kellner was 7-6(4), not 7-6(5).