The Gunners signed Lacazette in a £52m deal from Ligue 1 side Lyon in the 2017 summer transfer window after the striker has been regularly linked with a move to the Premier League over the past few seasons.
The France international has scored 10 times in 26 games in the Premier League this season but the striker hasn’t found his top form since his move to the north London outfit.
Lacazette fell down the pecking order despite his big-money move following the arrival of Pierre-Emerick Aubameyang in a £52m deal from Borussia Dortmund on transfer deadline day in January.
The 26-year-old scored two goals in one Europa League outing in the 2017-18 season after Lacazette scored twice in a 4-1 win against CSKA Moscow in the first leg of the quarter-final.
Former Chelsea FC midfielder Lampard has challenged Lacazette to take his opportunity in the Europa League with Aubameyang cup tied.
“Now is the time Lacazette has to cut out everything going on outside,” Lampard told the Evening Standard.
“He is a bit hurt that the club have gone out and spent money in January on Aubameyang but it’s still all there for him.
“Aubameyang is cup-tied in the Europa League so he knows there is a great chance to start every game.”
Lacazette scored 129 times in 275 appearances in all competitions since the Arsenal striker broke into the Lyon team.
The Gunners are in sixth place in the Premier League table and 13 points adrift of Liverpool FC and Tottenham Hotspur.
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