A pivotal member of Klopp's team, Firmino's fitness has been managed of late - the 25-year-old training away from his team-mates at Melwood at times in the week ahead of this weekend's clash at the Hawthorns.
"The thing is that it was not an easy season so far but there are still six games to go and he (Sturridge) is back".
Klopp said to the Liverpool Echo: "I see a lot of Premier League games so I see Crystal Palace too and I see how he is playing there and all this stuff. It was never the situation - really I lose a little admiration if folks say things in this way", he told United Kingdom papers.
"This season (we lost games) not because we didn't have a plan B but because we had difficulties in different games".
"The last thing I thought about [after hearing the news] was the game but when I watched the game yesterday and I can 100 per cent see both sides [why it went ahead]".
"There is no clause in the loan contract", he told reporters on Thursday.
Klopp said: "It was clear from the beginning that it was not a fixed term".
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The Liverpool boss has changed his tactics in recent weeks as he looks to secure a top four finish and Champions League football.
Klopp also offered updates on the fitness of skipper Jordan Henderson and Adam Lallana. We are still waiting.
The German did confirm that Steven Gerrard will take charge of an academy team next season, although he stopped short of saying which age group."He is doing a real job at the academy at the moment".
"Then, again, we'll have to do it again on Sunday against West Brom, and we'll have to prepare ourselves for that".
Then Watford comes and he should be in the squad or I can at least think about him.
"Liverpool will press us and push on to us so we've got to make sure that first pass from the turnover, that first pass is important and we've got to keep that first pass".
Gerrard is expected to take over the Reds' under-18 side next season after impressing Klopp and youth chief Alex Inglethorpe since his return to Anfield.