Klopp made the comments following Liverpool’s 3-1 win against Burnley away from home at Turf Moor in the Premier League on Wednesday evening.
Firmino, who can operate as a forward or as an attacking midfielder, scored the Reds’ second goal in the 69th minute.
The Brazil international has not been at his best so far this season, but Liverpool manager Klopp has said that there is no problem with the 27-year-old - who earns £180,000 per week as salary, according to Spotrac.com.
Klopp told Liverpool’s official website about Firmino: “It’s completely normal that Bobby sometimes feels a bit fresher and sometimes a bit less fresh. He is such an important player to us.
“If a few things don’t happen then it’s: ‘OK, what’s wrong with him?’ There’s nothing wrong with him – he’s always really focused, really in the game and stuff like that.”
Firmino has been rather inconsistent so far this season, and it is clear that the Brazilian does have to step up and maintain his high level for an extended period of time.
According to WhoScored, the Brazil international attacker has scored four goals and provided two assists in 13 Premier League starts and has scored two goals in 314 minutes of Champions League football for Liverpool so far this season.