Holland international Denny Landzaat is poised to become the first of a planned triple swoop this week by manager Paul Jewell.
The Latics boss has today confirmed the club have already agreed terms with the 30-year-old midfielder after last week finalising a fee with the Dutchman's club, AZ Alkmaar.
Landzaat, who tomorrow will fly in to put pen to paper on an expected three-year deal, will become Jewell's fourth signing of the summer following the captures of Emile Heskey, Fitz Hall and young Polish star Tomasz Cywka.
Jewell said: 'Denny's been on holiday in Italy, but the deal's agreed and hopefully he's just coming over to sign it.
'But you never know with transfers. Until the player signs on the dotted line you can't ever be certain it's going to happen.'
However, Landzaat, who is giving up UEFA Cup football next season with AZ to move to the JJB Stadium, is unlikely to do a u-turn.
AZ spokesperson Erik van Leeuwen told said: 'We are happy with the fee, and Denny has definitely mentioned he is willing to go to Wigan.
'It all looks very good for him. If he goes then we wish him well.'
After splashing out a club record £5.5million for Heskey, £3million for Hall and what is likely to be another £3million for Landzaat, Jewell's spending is not due to stop there.
The 41-year-old has two other irons in the fire, with the hope they will be on board before embarking on a pre-season trip to Austria on Sunday.
'We need to bring in some more players, that's for sure,' said Jewell on the club's website.
'Our achievements last season mean we've gone up a level of player and we're now competing with the teams who finished around us in the table.
'But we're working on it every day. We've already seen some new faces coming in, and real quality ones at that, and we won't stop trying to add to the squad until we feel we've reached the correct number.'