Arsene Wenger was forced to defend Alexis Sanchez after the Chilean stormed straight down the tunnel after being substituted.
The Arsenal forward endured a frustrating afternoon and Wenger took the decision to replace him six minutes from time, bringing on defensive midfielder Francis Coquelin.
But Sanchez made his feelings towards being substituted clear as made an instant beeline for the dressing room instead of sitting on the bench for the dying minutes.
Wenger tried to make light of the South American’s show of anger, saying: ‘My job is to make decisions, and to make people 100 per cent happy there, as well, is very difficult.
“Of course [he was not happy], I know Alexis very well, for a long time now, and he wants to play every minute. But what’s important is the team wins. The win was much wanted, needed and difficult.
“We played against a team very well organised and we didn’t find a good pace.”
The Arsenal manager also face unrest for his second substitution of the game, when he replaced Alex Iwobi with Danny Welbeck.
Fans at the Emirates, some of whom had been protesting against the Frenchman’s management, jeered the decision, calling instead for Olivier Giroud to be replaced.
The move paid off however, with Giroud providing the assist for Welbeck’s match-winning goal.
Wenger has been under pressure this season after Arsenal’s title challenge collapsed, with Leicester in pole position to win the Premier League.
But the protests against his management were overshadowed by a much louder, and unexpected, show of support by the Arsenal fans for their long-serving boss.
In the 12th minute of the match, a few hundred fans in the near-capacity crowd stood and waved the ‘Time for Change’ placards. It is 12 years since Arsenal won the Premier League.
A larger group of supporters then responded with chants of ‘There’s only one Arsene Wenger’ a minute later.