Benteke arrived at the club this summer, and scored his first goal for the club in the 2-0 win over Swansea at Villa Park, while Bent grabbed his first of the season against the Saints after making a comeback from injury this summer.
Lambert told The Sun: "I am sure we'll be fine. Christian was a handful and Darren is a goalscorer, but it will take time for them to gel."
|VILLA ROB MANCINI|
|9/1||Aston Villa are 9/1 with Bet365 to nick a 1-1 draw at Manchester City in the League Cup|
It was Bent's first goal for the club since the February ankle injury that sidelined him for the remainder of last season, and he showed characteristic predatory instincts to nip in and score from close range to put Villa in front.
"That's Darren to a tee," Lambert added. "That's how he has made a living out of the game with the way he can score."
Villa are currently in 14th position in the Premier League having won one and drawn one of their five games.