The former England international has returned to Aston Villa following his loan spell at relegated Fulham and his team-mate has backed him to rediscover his form at Villa Park
Bent has only scored six Premier League goals in the last two campaigns, marking a significant downturn in form from his 24-goal season at Sunderland, which came just before his big-money move to Villa Park in 2011.
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The 30-year-old is now back with Villa and team-mate Okore has seen enough in pre-season training to believe Bent can be an important part of Lambert's squad in 2014-15.
"Darren is a great player," he told the club's official website. "He's an attacker, he knows how to score goals.
"You can see that in training – he scores a lot of goals.
"Of course, he's back now and he will sharpen the attackers. I think last season we were a bit unlucky in that we had a lot of injuries in that forward position.
"So when they come back, we will have quality in the team and quality on the bench. That's what I am looking forward to."
Okore missed a large chunk of last season with a knee injury and will be looking to improve on a stuttering start to his Villa career.