Arsenal goalkeeper Petr Cech is adamant there can be no doubts about Alexis Sanchez's commitment.

The Chilean was jeered by sections of the crowd at the Emirates Stadium during his brief appearance as a substitute in the 3-0 league win over Bournemouth on Saturday.

However Cech said Sanchez, who was linked with a move to rivals Manchester City in the summer, was committed to the team's cause.

"I spoke with Alexis and he wants to win," Cech said.

"Sometimes people say 'he does this, he does that' but I think in a way, he is a guy who plays with all his passion and all his heart."