The latest Manchester United transfer news, views and rumours.
The Barcelona centre-back has revealed the former United captain 'still scares' him after telling stories of his dressing room antics at Old Trafford.
And, while he says Sir former manager Alex Ferguson has never necessarily intimidated him, the Spaniard says Keane most certainly does.
“I wouldn't say I was scared of [Ferguson]. Roy Keane? Well, maybe that's different!” Pique told FourFourTwo.
“I remember we were in the changing room at Old Trafford and my phone started vibrating. Keano could hear the vibrations and went crazy trying to find out who the phone belonged to. That’s who he was.
“Before we [Barca] beat Celtic 1-0 last season, I noticed him by the side of the pitch as a pundit as we went to warm up. I hid my face with my hand because he still scares me. I was 26 years old, and I was sh*tting myself!”
"Since my arrival not a day has passed without me being asked something about Manchester United. What was it like to play football with [Wayne] Rooney and [Robin] van Persie?" Buttner told Voetbal International.
"What was it like to work under [Sir Alex] Ferguson? Even during sponsor commitments these things are mentioned every time."