• Roberto Mancini accuses Ashley Cole of sparking tunnel row• City's manager furious not to be awarded first-half penaltyAndré Villas-Boas hailed Chelsea's re-emergence in the Premier League title race after watching his team beat the leaders, Manchester City, on a dramatic and contentious night that ended with the visiting manager, Roberto Mancini, accusing Ashley Cole of instigating a post-match row between the players in the tunnel.The Italian, furious that his side had not been awarded a penalty for an apparent trip on David Silva after Mario Balotelli had given them lead inside two minutes, mocked Cole and his Chelsea team-mates after Ci...