Wicker spokesman Ryan Taylor said since the investigation was ongoing, the senator couldn't comment.
The Blackpool keeper saved a long-range strike from Gutierrez and a free-kick from Ryan Taylor shortly after the restart.
Kakuta went off at half-time after a tackle by Ryan Taylor, while Kalou himself was replaced in the 56th minute.
Both Stead and Pollitt required lengthy treatment before continuing, while Wigan lost Ryan Taylor with a leg injury sustained in the same incident.
Ryan Taylor's brilliant 20-yard strike put the visitors ahead early on but Emmerson Boyce was harshly awarded a second yellow card after half-time.
An attempted nodded clearance from Ryan Taylor hit his own keeper Tim Krul before going into the Magpies net to give Arsenal the lead.
Wigan might have been level within a minute when Heskey wrong-footed Craig Gordon from Ryan Taylor's long throw but his effort skidded inches wide.
BBC: SPORT | Football | Premier League | Sunderland 2-0 Wigan
And the Latics should have taken the lead after three minutes but Ryan Taylor's free-kick was volleyed wide from six yards by Lee McCulloch.
The left-back headed in Ryan Taylor's corner on 90 minutes to notch his first goal for Wigan and ensure Spurs stay in the bottom three in the table.
However, at this stage Chelsea were already 3-1 down after Nile Ranger's volley had cancelled out Patrick Van Aanholt's opener before Ryan Taylor and Shola Ameobi put Newcastle in control.
Newcastle signed Bolton midfielder Kevin Nolan on Friday to cover for the loss of Barton, who will have an operation on Friday, and have been linked with a move for Wigan defender Ryan Taylor.
But both sides kept up the entertaining pace and Heskey's replacement, Ryan Taylor, broke free down the left to connect with a deep Melchiot cross forcing a strong save from City keeper Andreas Isaksson.
Duff's cross from the left found Ryan Taylor, whose volley ricocheted off two West Brom defenders before the ball found its way to Lovenkrands and the 29-year-old Dane, on a contract until the end of the season, marked his first start with a calm finish from eight yards.
Ross Taylor (55) and Matthew Sinclair (39) shared 81 but Ryan Sidebottom (3-72) and Stuart Broad (2-38) raised the prospect of a quick England win.
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