Chelsea forward Romelu Lukaku needs to find "that one spark" to get back to his best says Blues boss Thomas Tuchel.
Lukaku has started two of Chelsea's past 13 matches in all competitions and has just five league goals this term.
"After period of injury he [Lukaku] lacks simply the fitness for matches, which is not pointing the finger it's just a fact," Tuchel said.
"It's not his fault. I don't think he [Lukaku] really needs inspiration. What he needs is maybe that one moment, that one spark.
"Normally he would be a natural starter against Crystal Palace [in the FA Cup] in terms also of the amount of minutes that Kai Havertz has played now and the physicality that Kai gives to matches, but it's in the crucial time of the season where you need to have a certain rhythm.