West Ham sign Manuel Lanzini on four-year deal - source

West Ham have completed the signing of Manuel Lanzini on a four-year contract from Al Jazira, a source has told ESPN FC.

Lanzini, 23, had been on loan from UAE club Al Jazira and has now sealed a permanent switch to Upton Park. The deal, which includes an option for a further two years, is reported to be worth around £9 million.

Boss Slaven Bilic has now secured the futures of three of his key players after Dimitri Payet and Cheikhou Kouyate recently signed new long-term contracts.

Lanzini is back to full fitness following a spell on the sidelines with a thigh injury. The Argentinian scored his sixth goal of the season with a fine 20-yard curler in the 2-2 draw at Chelsea on Saturday.

France playmaker Payet has taken most of the spotlight for West Ham this season but co-owner David Sullivan says Lanzini is just as important.

"You say Payet and, yes, he is our star, but I can say Lanzini, [Michail] Antonio, [Mark] Noble, Kouyate," he told the Daily Mail.

"We've just given Kouyate a new deal, even though he had more than four years on his last one. We want to reward excellence. They have all played their part.''

Information from the Press Association was used in this report.