Joao Mario admits Jose Fonte was key to his move to West Ham.
Mario has joined the Irons on-loan from Inter Milan to the end of the season.
"I knew West Ham were a big club with a lot of history so it was easy to come," he told Sky Sports.
"It was great because also here at West Ham is Jose Fonte, who plays with me for the national team. That's made it easier.
"He said good things and tried to convince me all of the time. He told me to come to the best league, a great club and enjoy. That helped a lot so I came to see for myself."