Antonio Pirlo does not believe his bosses are happy with his efforts after Juventus were held to a 1-1 Serie A draw at Fiorentina.

Dusan Vlahovic gave the relegation-threatened Viola a deserved first-half lead from the penalty spot at Stadio Artemio Franchi on Sunday after Adrien Rabiot handled in the area.

Bianconeri head coach Pirlo reacted to a lacklustre display in the opening 45 minutes by replacing Leonardo Bonucci and Paulo Dybala with Alvaro Morata and Dejan Kulusevski, changing the formation after starting with three at the back.

Morata made an instant impact, equalising with a sublime left-foot finish just 31 seconds after coming on, but the champions failed to go on and secure three precious points.

Juve sporting director Fabio Paratici stated ahead of the game that Pirlo's job would be safe if they finished in the top four, but fifth-placed Napoli can join them on 66 points with five games to play by beating Torino on Monday.

Pirlo says he is learning on the job but knows he has fallen short of expectations in his first season at the helm.

He told Sky Italia: "The initial expectations [when he took charge] were different and I don't think I did the job as intended.

"Every game that passes you learn something but I'm not happy and I don't think the club is either."

Morata's sublime strike was Juve's only shot on target and Pirlo says their first-half performance was not good enough.

"There was a very bad first half that had to be faced in a different way. It was fundamental for the Champions League race. In the second half we were better." said the former Italy playmaker.

"We decided to put Morata on to change pace and that happened. We had to deal with it in another way. The three-man defence didn't go well, we had tried one thing and another happened. We changed it and it was better."