"My serve didn't have that spark" says Medvedev after ATP Finals loss

From the start, it was apparent that Zverev was the more focused in the match as his play was simply sharper. Medvedev looked good but there were certain things in his game that did not work as well as he would have hoped. Something was missing and Medvedev himself admitted that after the match saying:

“It’s tough to say, maybe some tiredness of the body, maybe mentally I wasn’t 100 per cent. Not that I didn’t want to be, but definitely something was missing. I don’t have the answer, but it made the difference."

He further continued:

“Even when [my serve] was going on the line, it didn’t really have that spark. It wasn’t enough for Sascha, who is a great player and broke me two times. Sometimes, in a way, it’s not bad, but when you’re playing in a big final on a fast surface against someone who is serving like Sascha, it’s enough to win the match. We can talk about many things, but the serve was definitely the key today, and he was better.”

Medvedev finished it off with:

“But he’s not the only one and that’s where it gets tough. He was in the semi-finals of the US Open and lost in five sets [to Novak Djokovic]. Who knows maybe if he was in the final he might have beaten me. It’s just a matter of every tournament is a different scenario and surface, you have to win seven matches to be a Grand Slam champion. Is he capable? Yes. Is he going to do it? We never know.”