AlQa'dah 17, 1436, Sep 1, 2015, SPA -- Manchester United completed the signing of teenage forward Anthony Martial from Monaco on Tuesday, dpa reported. Martial, 19, signed a four-year contract with an option for a further year, United said on their website. UK media reports said the transfer fee was 36 million pounds (55 million dollars), making Martial the most expensive teenager in British football history. -- SPA 21:43 LOCAL TIME 18:43 GMT تغريد