Cesc Fabregas scores his fourth hat-trick for Barcelona in absence of injured Mallorca . Alexis Sanchez scores other two goals in Spanish leaders ' 5 -0 win over Lionel Messi . Lionel Messi makes his long-awaited return for Barca after liver transplant . Cesc Fabregas opponents PSG extend French lead with win .
Cesc Fabregas scores his first hat-trick for Barcelona in absence of injured Lionel Messi . Alexis Sanchez scores other two goals in Spanish leaders ' 5-0 win over Mallorca . Eric Abidal makes his long-awaited return for Barca after liver transplant . Champions League opponents PSG extend French lead with win .