A select round-up of the latest West Ham United news...
The newspaper understands that the Londoners paid a fee of £4 million to secure the Argentine's services for the year.
West Ham manager Slaven Bilic
The Croatian elaborated on his transfer plans further, when writing his column for the Evening Standard, highlighting midfield as an area where he would still like to strengthen:
"Maybe we go for one more in midfield if, hopefully, we qualify for the Europa League group stage but it won’t be a huge transfer."
West Ham's new signing Andre Ayew
"He adds more quality. He came to England and did a really good job. He scored 12 goals and played in different positions. He can be a game changer."
And finally, the Hammers' summer-long battle to bring Carlos Bacca to the club looks to have ended in disappointment, as the player has reportedly opted to stay with AC Milan, according to the Evening Standard.
West Ham have, however, recruited two other forwards in the form of Ayew and Calleri, whilst Diafra Sakho has still not left the club, so there should still be plenty of goals in their forward line.
Carlos Bacca has decided to stay with AC Milan