Manchester City attacker is on loan at Celtic.
Manchester City and Celtic will face each other in the Champions League on Wednesday evening.
Manchester City have loaned Patrick Roberts to Celtic until the end of the season.
The Scottish champions were beaten 7-0 at the Nou Camp on Tuesday.
Enrique's Barca host Celtic in the Champions League group opener on Tuesday night.
Celtic won against Old Firm rivals Rangers in the Scottish Premiership on Saturday.
The two sides meet in the Old Firm derby this weekend.
The Bhoys winger will face the Gers on Saturday, and the occasion could well bring back terrible memories.
Celtic welcome Rangers on September 10 for the first Old Firm game in the Premiership since 2012.
The winger is currently on loan at Celtic Park, with the two sides set to meet in the Champions League.