Atletico Madrid midfielder Koke is confident of Antoine Griezmann's commitment.
The Frenchman is being linked with Barcelona this week.
However, Koke said Griezmann was "committed" to the club, despite the links to Barcelona.
"Antoine could have left last season, he hasn't left, I think he feels comfortable here," said Koke.
Of the derby with Real Madrid, he continued: "I expect the best Madrid. Lately we haven't seen them at their best, but they have great players and they'll always give their best.
"I expect a Madrid that will give everything, above all because the game is a derby, they will come with a lot of desire.
"I feel well (after injury), the international break was good for me," said Koke who can now "arrive strongly for the rest of the season".
Source: tribalfootball.com