Liverpool boss Jurgen Klopp said it was hard to substitute Xherdan Shaqiri at half-time after the Swiss worldwide had been influential in helping his team to a 3-0 half-time lead over Southampton at Anfield.
Salah finished his first season with Liverpool having scored 44 goals across all competitions including 32 in the Premier League to win the Golden Boot.
Despite creating Mohamed Salah's goal, Shaqiri was dragged off at the break.
Klopp brought on James Milner at the break as Liverpool eased to victory to maintain their flawless Premier League record and he explained his choice in a post-match news conference.
Liverpool supporters will be already looking forward to seeing him against Chelsea in the Carabao Cup on Wednesday, with Klopp confirming his half-time change was for tactical reasons rather down to fitness.
Salah and Liverpool will be looking to continue their ideal start to the season this weekend, when they welcome Southampton to Anfield on Saturday. The start was good for the team and also him as well. You saw the free-kick, it was outstanding.
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"Today we had a few problems but we can still increase".
The Switzerland global started for the first time in the comprehensive 3-0 victory over Saints, and had a hand in two of the side's three first-half goals.
The Dutchman is effective in a multiple of roles and over the course of the game oscillates at times between box to box midfielder to a deep-lying midfielder.
"I lost seven games in a row once, that felt different", Klopp, who watched his side reclaim top spot in the Premier League, said.
'All the different challenges with the different styles of the opponent, the boys were there. "But he is still a threat, has fantastic situations in both games and he is in good shape". It will be tough, but for all of us. "It is better to win these games than draw them or lose them, but I am really sure we are mature enough to understand it in the right way".
"We were 3-0 down at half time and there is a danger you go completely under and that would have damaged us even more than the 3-0 performance in the first half", Hughes said.