The Frenchman was linked with moves away from the London club this summer.
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Mateta is yet to sign a new contract and was wanted by Aston Villa late in the window.
Reflecting on events, Mateta has told L'Equipe : "I am someone who is realistic.
“The club didn’t want to sell me, so I move on and I give everything to the team to help us get better results than those we achieved last year."
Asked if the saga could continue into January, he added: "When it is the right time to ask those questions, we’ll ask them."