Mario Balotelli is set to be fined by Liverpool [AP]
Balotelli and Pepe exchanged shirts as the two teams headed down the tunnel at the break.
The reaction from Anfield and elsewhere was negative, with Reds legend Jamie Carragher insisting the Italian should never have been signed.
And Liverpool are preparing to punish Balotelli for breaking Kop boss Brendan Rodgers' code of conduct.
Last season Rodgers fined both Mamadou Sakho and Philippe Coutinho for swapping shirts with Chelsea players at the interval at Stamford Bridge.
And when asked if Balotelli would face a similar rap, Rodgers said: "Yes, and it's exactly the same. We had an incident last year and it was something that was dealt with internally.
"It's not something that I stand for, if you want to do that do it at the end of the game, and I will deal with it tomorrow.
"It was purely a tactical change to take him off."
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