Cahill: Ryan Mason retirement is heart-breaking Unknown 01:54 It was a clash of heads with the Chelsea defender that left Ryan Mason with a fractured skull and forced him to retire a year later Share this Share on FacebookTweet on TwitterPlus on Google+ Related PostsKhelo India Youth Games 2019: Punjab to face Haryana in U-17 hockey final; Bengal dominate gymnastics with eight medalsAustralian Open 2019: Roger Federer to speak with Novak Djokovic, Rafael Nadal and Andy Murray about ATP Tour's issuesSerie A: Chelsea target Gonzalo Higuain wants to leave AC Milan, says coach Gennaro GattusoAustralian Open 2019: Defending champion Caroline Wozniacki says there is no extra pressure in returning as title holderPremier League: Willian says he has no intention of leaving Chelsea despite rumours of potential exitAustralian Open 2019: 'Legend' Andy Murray can be incredibly proud of his achievements, says Roger Federer