Pepe and Herrera are both banned and three of their team-mates are one booking away from a ban .
Porto have got disciplinary worries ahead of Tuesday night’s Champions League quarter-final with Liverpool at Anfield.
Former Real Madrid defender Pepe and Mexican midfielder Hector Herrera are both ruled out of the first leg as they serve suspensions.
And Porto also have no fewer than three players who will miss next Wednesday’s second leg at the Estádio do Dragão if they pick up a booking at Anfield.
Highly-rated centre-back Eder Militao and midfield duo Otavio and Danilo will all be walking a disciplinary tightrope.
Brazil international Militao recently became the first signing of Zinedine Zidane’s second spell in charge of Real Madrid having agreed a deal which will see him move to the Bernabeu in the summer.
Liverpool left-back Andy Robertson serves a one-match ban on Tuesday night after collecting his third yellow card in the competition this season in the closing stages of the win away to Bayern Munich last month.
However, the good news for Jurgen Klopp is that no Reds players are one booking away from missing next week’s second leg. All yellow cards expire on the completion of the quarter-finals.
Spanish referee Antonio Mateu Lahoz will be in charge of Tuesday’s game.
He also refereed Liverpool’s 2-0 defeat away to Red Star Belgrade in the group stage back in November.