The Tottenham Hotspur star was pleased with his side's ability to 'fight to the end.'
The Argentine winger played the full 90 minutes as Tottenham left the Emirates Stadium with a 1-1 draw - and received a yellow card for his efforts.
Nacer Chadli had put Spurs 1-0 ahead against their fierce rivals, only for Alex Oxlade-Chamberlain to equalise almost 20 minutes later.
There were no more goals as this season's first north London derby finished all square, meaning Tottenham were unable to win their first game at Arsenal in four years.
But, as Lamela points out, a draw with the Gunners was a strong result under the circumstances. A disciplined defensive performance from the visitors, meanwhile, prevented the scoreline from being much less favourable for Spurs.
"Difficult game, we could have won but we have not lost... and fight [sic] to the end, that's what matters," he wrote on Instagram.
Mauricio Pochettino's side are now without a league victory in their last four games, with high-flying Southampton their next opponents in the Premier League.
The Saints travel to White Hart Lane next Sunday but not before Tottenham host Besiktas three days before that on Thursday night in the Europa League.