Alexandre Lacazette fired Arsenal to north London derby victory from the penalty spot as 10-man Tottenham succumbed despite Erik Lamela’s outrageous opener.

Lacazette, captaining the Gunners after Pierre-Emerick Aubameyang had been withdrawn from the team following a breach of pre-match protocols, converted a 64th-minute spot-kick to secure a 2-1 fightback win.

Emile Smith Rowe was unfortunate not to open his league account when his 16th-minute effort came back off the crossbar with Hugo Lloris beaten, and substitute Lamela, on for the injured Son Heung-min, took full advantage with an audacious rabona finish from Lucas Moura’s lay-off 12 minutes before the break.

At the other end of the table, Leandro Trossard’s third goal of the season dragged Brighton three points clear of the relegation zone courtesy of a 2-1 win at Southampton.

Lewis Dunk got the visitors, who started the day clear of the bottom three only by virtue goal difference, off to the perfect start when he headed Pascal Gross’ 16th-minute corner firmly past keeper Fraser Forster.

Che Adams volleyed the Saints level within 11 minutes after Dunk had been unable to cut out Ryan Bertrand’s header back across goal, but Trossard restored the Seagulls’ lead 11 minutes after the restart after running on to Danny Welbeck’s deft touch, in the process perfectly setting up a relegation six-pointer showdown with Newcastle on the south coast next weekend.