The striker missed a host of chances as Aston Villa fell to a 4-1 defeat at Old Trafford, but the manager highlighted past match-winning performances amid post-match criticism
Wayne Rooney's double before half-time cancelled out Ashley Westwood's early free kick as United responded well to a week that saw them thrashed 3-0 by Manchester City.
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Chicharito added gloss to the scoreline in stoppage time to consign Villa to their heaviest away defeat of the season.
But Lambert absolved his star striker of any culpability for the result, hailing Benteke's previous sterling service for the club instead.
"After the restart we had some fantastic chances and they fell to the big lad who's normally lethal from that distance," he told reporters.
"But I can't be too critical of Christian because he has scored some vital goals for us in the last 18 months and he'll continue to do so.
"He was in the position to score the goals, he might have had a penalty, and he'll come back stronger."