“I think Chelsea deserve to win.
Although we also had moments.
If they had scored, they could have played in a draw, "Semak said on the air of the Match TV channel.
Zenit were defeated by Chelsea with a score of 0: 1.
The only goal was scored by Romelu Lukaku in the 69th minute.
Group H game Chelsea - Zenit took place in London at Stamford Bridge stadium.
In the next match Zenit will host Malmö (Sweden) on 29 September.
Earlier it was reported that Zenit could not win in the Champions League for eight matches.