Manchester United, Manchester City and Tottenham Hotspur are all interested in the defender, who made his worldwide debut against Germany last month.
The 24-year-old left Old Trafford for Burnley in 2015 after former manager Louis van Gaal deemed him surplus to requirements.
"It's another good game at Turf Moor, we've made it a really tough place to go, and hopefully we can do that again", Heaton said of a place where Burnley have already won 10 Premier League games this season.
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"Nothing has changed - he's focussed on the job in hand, he's delivering performances, any other information will be in the summer and only if it's an appropriate situation for all parties".
Everton are believed to be leading the way for Burnley defender Michael Keane's signature. When everyone reads it, they'll all say: 'That's exactly what we've been told'.
"It's probably not if I'm honest", Heaton said when asked if the Ibrahimovic save was his best of the campaign.
"We'll look at it and speak to the relevant people, if it doesn't fit, crack on".
Although they are eight points ahead of Swansea and relegation zone, they are seeking to finish the season as high as they can and to avoid possible problems in the finish of the season.
Michael Keane's suitors have been warned by Sean Dyche that Burnley hold all the cards when it comes to the defender's future. "It's a financial numbers game, and it's about players that are happy and settled, your divisional status, and so on".
The 2-0 win over Chelsea has given United fresh hope they can secure a return to Europe's biggest stage next season and a win will leave them within touching distance of the top four.
Burnley had agreed to re-sign Barton prior to Christmas, three days before his FA charge came to light, and he rejoined the Premier League side when the window reopened in January.
Dyche added: "The margins are tight wherever you are in the division". Just one win in their last eleven games in all competitions are the reason for alarm in Burnley. He's a top-class player; you can't achieve what he's achieved in the game and not be a top-class player.
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