Sergi Roberto has to be very careful against Roma
The Barca right-back is one yellow away from suspension
• Sergi Roberto is the only Barcelona player who risks missing the second leg of the Champions League quarter-final against Roma if he gets booked on Wednesday.
Roma players Konstantinos Manolas and Diego Perotti are in the same situation as the Spaniard.
Barcelona host Roma on Wednesday at 20:45 CET.