Aston Villa manager Paul Lambert hailed the "world-class" finishing of two goal hero Christian Benteke but felt his overall game was not up to standard during the 3-2 win at Swindon in the Capital One Cup.
The Belgian international scored an injury-time winner to earn Villa a quarter-final spot for the third time in four seasons.
Benteke and Gabriel Agbonlahor had given Villa a 2-0 lead before Robins substitute Miles Storey's brace looked to have forced the game into extra-time before Benteke struck for the second time. Lambert said: "Benteke has had a quality start (at Villa) but his game wasn't up to my standards."
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