Rules of the WTC

[wzfcns]

As the picture shows, my teammate (Roman) got 15:37 against his opponent (Persian), and then his opponent didn't reply for the whole day. Since tomorrow is the deadline for the match, I have to ask: If his opponent continues not to reply until the end of the match, should the result of the match be considered a victory for my teammate or a draw? I think this could lead to unfair tactics, such as slowing down the response rate to the end of time when someone is at a disadvantage.