London: Liverpool made official on Tuesday the signing of Senegalese striker Sadio Mane from Southampton for the next five football seasons. Mane, 24, joins Liverpool in a deal that cost 34 million pounds sterling ($45.3 million). He underwent medical tests on Monday. "I am very happy to be a part of Liverpool Football Club," the Senegalese told the Liverpool website. Mane has scored 21 goals in 67 English Premier League (EPL) matches with Southampton since arriving in 2014.