Liverpool boss Jurgen Klopp explained substituting Philippe Coutinho during their 1-1 draw with Burnley.
Coutinho appeared confused when being called to the touchline.
And Klopp explained: "He needs rhythm.
"We didn't want to change him, it looked a little bit confused when we brought the subs on because I asked him and it was a thumb up. When they got drinks in a little interruption, he said 'OK, it's only cramp, but maybe better to stop' and we had to change this."