“We all know he’s a great player. He’s having a fantastic season at Dortmund.
“But it’s not my responsibility to speak about those things.
“I like him as a player but I cannot reply to that.”
Not long after Mata had answered the question, Hummels was invited into the session.
And the German was quick to make it known he was already watching and had heard what Mata had to say about his team-mate.
“I was listening to you talking about Sancho!” Hummels said as both players burst into laughter.
