Harry Kane netted his seventh goal in seven north London derbies as Tottenham beat bitter rivals Arsenal 1-0 at Wembley on Saturday.
The England forward rose highest to meet Ben Davies' searching cross and head past the helpless Petr Cech after only five minutes of the second half.
Dele Alli, Erik Lamela and Christian Eriksen all came close for Mauricio Pochettino's side and they looked set to rue those misses when Alexandre Lacazette raced in on goal in the dying moments. But the French forward's shot slid agonisingly past the post.