Szoboszlai had missed Liverpool’s last two games due to a hamstring injury and lasted just 32 minutes against Brentford due to a recurrence of the same issue.
Frimpong, meanwhile, came on as a half-time substitute but was forced off after just seven minutes.
‘I think we have a very delicate situation,’ Iraola said after Liverpool’s win.
‘We were coming from playing Champions League away two days ago, we arrived [home] late at night and probably with not a proper recovery.
‘You are in doubt between the players that have already started two games and are very tired, or the players that are recovering from injuries but you’re probably not 100 per cent certain.
Jeremie Frimpong was on the pitch for just seven minutes in Liverpool’s win over Brentford (Shutterstock)
‘They were different cases. Dom felt the same injury, it’s not a new injury and was probably not healed enough, so we will need more time with him. Jeremie’s was new, I think he finished cramping the other day [against LASK].
‘I put him on because playing against 10, going forward I thought he could give us more than Ronald. After, I value a lot and he was very good, Victor playing as a right-back.
‘But it will mean we will lose Dom and Jeremie for some time, yes.’
