Alexandre Lacazette faces an uncertain future at Arsenal but Mikel Arteta spoke out in praise of his recent performances.
There were wins for Liverpool, Arsenal and Tottenham in the Premier League on Sunday, while Manchester United drew with Chelsea.
Nicolas Pepe scored for the fourth time in seven Premier League starts as Arsenal came from behind to beat Leicester City.
Barcelona have hope of keeping Lionel Messi, who is out of contract at season's end.
Bukayo Saka came in for praise from Arsenal manager Mikel Arteta, who said the club are close to signing Martin Odegaard from Real Madrid.
Arsenal beat Southampton 3-1 at St Mary's, where they had suffered a 1-0 defeat in the FA Cup just three days earlier.
Kieran Tierney has been in fine form as Arsenal have started to turn their form around, and Mikel Arteta believes the full-back is a leader.
Marcus Rashford was Manchester United's late hero and Alexandre Lacazette made a swift impact for Arsenal in Tuesday's Premier League games.
Alexandre Lacazette's latest Arsenal goal secured a second straight win to further ease the pressure on Mikel Arteta.
Mikel Arteta dropped Alexandre Lacazette at Brighton but was grateful to the Arsenal substitute for a vital second-half goal.