West Ham are facing competition from rival clubs for Sporting Lisbon's £36million-rated William Carvalho.
Slaven Bilic is waiting for the thumbs up from Hammers co-chairman David Sullivan that they have bagged Carvalho but the Premier League club are not alone in pursuing the star.
'It is very busy,' conceded Bilic. 'It is becoming more busy in other clubs. I have left it to the board, to the chairman, to the people involved in those ins and outs.
'I am concentrating only and totally on our game against Southampton.