May 13 (Reuters) - Barcelona have tied one of their promising forwards to the club for another four years by extending the contract of 19-year-old B team forward and Spain Under-21 international Gerard Deulofeu until June 2017. The deal includes a buyout clause worth 35 million euros ($45.44 million), the club said on their website (www.fcbarcelona.es). A product of Barca's youth academy, Catalonia-born Deulofeu has played 35 matches for the B team this season, scoring 18 goals. He has also made four appearances for the first team. ... More...