Despite the win, Baup feels that his side should have put the game beyond doubt before half time.
"The game started well for us. We had secured a 3-0 [lead] in no time at all and that was important," Baup told reporters.
"We could even have scored a fourth or fifth goal in the first half. The second half was certainly more difficult. We left more space for the opposition to play.
"There are still a lot of things to work on but it is great to have scored three goals in our opening game."
Marseille host Evian TG next weekend.