Arsenal defender Takehiro Tomiyasu has admitted that he does not like taking on teammate Gabriel Martinelli in training.
The young winger, who is set to sign a new contract, is one of the most feared wingers in the Premier League at present.
And Japanese defender Tomiyasu, who has been in and out of the team this season, admits battling the 21-year-old is a challenge.
Asked by Goal.com about the teammate he would never like to face competitively, he replied: "Gabriel Martinelli. He never stops."
He then added: "He has pace, aggression. He's still young, but when he has the ball he wants to make the difference, he wants to do something."