West Ham United confirmed on Friday that they have signed Mexico winger Pablo Barrera and Lyon striker Frederic Piquionne, dpa reported.
Barrera, a 23-year-old Mexico international, has signed a four-year deal after agreeing to a 4-million-pound (6-million-dollar) moved from Pumas, while Piquionne, who played under Hammers boss Avram Grant at Portsmouth last season, arrives for an undisclosed fee.
"I am very happy to sign for West Ham because my last manager was Avram," the 31-year-old Frenchman told the club's website.
"I know Avram and I like working with him and I think he likes me. I'm coming to work hard for the squad and I hope we have a good season.
"Avram is a very, very good coach. Last year we had many problems at Portsmouth but we got to the FA Cup final. He's a very good manager."
Barrera made three substitute appearances for Mexico at the World Cup.
"I am very happy to sign for West Ham United and have been really taken by the reception I have received from the players and the manager," Barrera told the club's website.
"I have had a great welcome. I knew about West Ham when I was in Mexico.
"They are a big club and I have heard about the great players they have had in the past. I have heard a lot more about the club and its traditions since I have been in London and I am very excited to be here."