The former midfielder has struggled to justify that with his team reaching a new low in the last four months.
Lacazette has one year remaining on his Emirates Stadium contract and is apparently open to joining Barca.
Eight minutes later and he nearly had another but Leno thwarted his close-range shot following Wilfried Zaha’s cross.
In a major attacking boost, Arteta will be able to welcome Emile Smith Rowe and Bukayo Saka back to the squad.
The first leg at the Emirates Stadium looked set to end in a goalless stalemate as Arsenal passed up a number of fine chances.
The Arsenal forward, who was also flagged offside on four occasions, knows his subpar performance could prove costly.
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