Serena Retires | Merseyside derby and Old Firm | Mageean breaks Sonia's record | THE NEWSROUND

Will O'Callaghan joined John Duggan on The Newsround on Saturday's Off The Ball. They discussed the Merseyside derby between Everton and Liverpool, Celtic's clash with rivals Rangers, and Bohemians' victory against Shamrock Rovers. Serena Williams' retirement from tennis was also on the agenda and Ciara Mageean smashing Sonia O'Sullivan's Irish 1500m record.