Barcelona's Sergi Roberto will be fit to face Juventus in their opening Champions League Group D game on Tuesday after missing the Catalan derby against Espanyol with a knee problem. The versatile midfielder sat out Barca's 5-0 win against their local rivals on Saturday but trained on Sunday. "We think Sergi Roberto will be available, he trained well yesterday," Barcelona coach Ernesto Valverde told a news conference on the eve of the game at the Nou Camp. However, striker Paco Alcacer missed Monday's session with a stomach bug according to local media reports and is doubtful. (For more sports news and updates, follow Ahram Online Sports on Twitter at@AO_Sportsand on Facebook atAhramOnlineSports.)