West Ham have recently been linked in media reports with City striker Iheanacho and full-back Zabaleta.
Following what's been a mediocre season, Slaven Bilic's future is reportedly becoming unclear at the club.
"He played with pain (in) the last few games, then we chose to do the operation after the Liverpool game".
An indifferent performance this season at one stage saw Bilic's side flirt with the Premier League relegation zone.
West Ham boast the bragging rights against Burnley in the battle of the claret shirts.
As for West Ham, the London club will be playing for pride, as it does not look likely that they will break into the top 10 of the Premier League.
Youngster Declan Rice is expected to deputise in Reid's absence, while Mark Noble, Cheikhou Kouyate, Andy Carroll and Michail Antonio are just some of the other names on a lengthy injury list.
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Fellow defender Ben Mee is also a doubt with the shin problem that has ruled him out of Burnley's last three matches.
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West Ham will travel to Turf Moor with a patched up squad. The last West Ham player to score more than 10 goals in a Premier League season was Bobby Zamora (11) in 2006-07, meaning the club will have gone nine successive seasons without one of their squad scoring more than 10 times in the competition.
However, Bilic insists that he already has plenty of players willing to step up and take responsibility and hinted that he would not be looking to add any more this summer.
The Hammers will certainly fancy their chances of returning from Lancashire with all three points, as they have won on their last two visits to Turf Moor, including a 3-1 success in October 2014.
Burnley have got to be careful next year.