The Belgium international came off the bench after Roberto Firmino levelled for 10-man Liverpool following Joe Ledley’s opener in the English capital.
Liverpool, who had vice-captain James Milner sent off in the second half, sealed three points after Benteke scored the winner from the penalty spot in south-east London.
The Belgium was criticised for going down softly by some former professionals on Twitter, but Liverpool midfielder Can was impressed with Benteke’s match-winning impact from the bench.
Can wrote on Instagram: “What a comeback with 10 man on the pitch!!! Very happy for @christianbenteke performance and goal😁💪👍 #ynwa #liverpool”
Benteke moved to Liverpool in a £32.5m deal from Aston Villa in the summer transfer window.
Liverpool’s second most-expensive signing has scored seven goals in 24 Premier League appearances so far this season.
The Reds are in seventh place in the Premier League table and six points behind Manchester City in the race for a Champions League spot.
MORE: Latest Man Utd news
MORE: Latest Arsenal news
MORE: The latest football news