Liverpool will hand a debut to new goalkeeper Alisson Becker in Saturday's friendly with Napoli in Dublin, while Trent Alexander-Arnold and Roberto Firmino are also set to feature and will be fit for the start of the Premier League season.
Liverpool's world-record signing Alisson will reportedly wear the number 13 jersey for the Reds.
The Anfield club have made progress during the German's reign, but they have also lost in three cup finals - the League Cup, Europa League and Champions League.
Alisson had been the number one goalkeeper in both standing and number for Roma last season but now at Liverpool Loris Karius holds the no. 1 jersey.
Alisson started training with Liverpool earlier this week following a break after Brazil's World Cup campaign.
Mignolet, Jordan Henderson and Dejan Lovren will return to training at the beginning of next week, giving Klopp a full squad for the first time this summer. We planned it a long, long time ago - it was still last season when we said we wanted to have this game, to make it possible for all the people in Liverpool to come to Anfield.
Liverpool are now training in south-eastern France ahead of their final pre-season friendlies and are expected to return to Melwood next week before the opening day of the Premier League. "The signs are really good for us to go the next step". "It's only positive, even the performance in training - which is not too important in the beginning - are already exceptional, so all good".
Liverpool face West Ham United in their first league fixture on August 12.