Lucas Moura has been settling into training with Tottenham this week following his £25m Deadline Day move from Paris Saint-Germain.
The Brazilian was pictured on Tuesday laughing and joking with Moussa Sissoko and Serge Aurier, who he played with at PSG.
Moura has been told he must get up to speed and the required fitness levels before being in contention to make his debut. The 25-year-old had made only six appearances for PSG this season before his switch to London.
Manager Mauricio Pochettino said: "For him, he's not going to come here and say, 'oh because he is Lucas Moura and came from Paris St Germain, he's going to play.
"He needs to show that he is better than our players. That is the fair competition. If you are in Paris Saint-Germain and Neymar arrives, if he is better than you then he plays. It's fair, he's better.
"If not, then they need to compete. Lucas Moura must compete with Lamela, with Sonny, with Eriksen."
Moura is ineligible to play in Tottenham's FA Cup fourth-round replay against Newport County at Wembley on Wednesday because he was not registered for the first game, which ended 1-1.