Ancelotti is fielding the midfielder in a deeper role, who shone in victory at Lazio.
And Martin Petras said, “Marek still needs to improve in his new role, but it's inevitable that he will.
“Marek has great qualities and I think Ancelotti giving him this new role was excellent, almost perfect. It'll be a new stimulus for him.
“After all, you can always improve. Look at Federer, who continues to do so despite his age…
“At the end of the game Marek was happy, his team won, it mattered for them and in my opinion he didn't expect such a result at the Olimpico. No-one else did.
“I think their players will be at peak fitness in a couple of weeks, in time for their Champions League debut.
“Taking him off on 70 minutes? It was hot and a fair decision. It happened to him on Sunday, but it could happen to someone else next time."