UPDATE 5-Soccer-Leaders Inter rally to draw 3-3 with Roma

(Adds Mourinho quote)

* Leaders Inter Milan rally to draw 3-3 with AS Roma

* AC Milan lose 2-1 at Sampdoria

* Mascara scores remarkable goal in Catania's 4-0 win

By Paul Virgo

ROME, March 1 (Reuters) - Teenager Mario Balotelli struck twice and Hernan Crespo scored a late equaliser as Serie A leaders Inter Milan rallied to draw 3-3 with AS Roma in a thriller at the San Siro on Sunday.

First-half goals from Daniele De Rossi and John Arne Riise had Roma on top while Matteo Brighi briefly restored their two-goal advantage after Balotelli had side-footed his first goal five minutes into the second.

Balotelli, in the starting line-up as Zlatan Ibrahimovic was on the bench with a muscle problem, narrowed the gap again with a penalty in the 63rd and substitute Crespo, making a rare appearance, completed the comeback with a header in the 79th.