The midfielder moved to Newcastle United in the January transfer window.
Shelvey completed a move to Newcastle United in the January transfer window following an acrimonious end to his time in Wales.
It has not been an ideal spell at St James' Park for him though, with a bright start having fizzled out and his side currently looking likely to be relegated from the Premier League.
In contrast, his old team have turned things around under Francesco Guidolin and appear to have secured their own safety for another year.
And Cork insists that there can be no time for sympathy for their fellow teammate, as the two sides meet this weekend.
"We cannot have any sympathy," he told the Express.
"Jonjo has made his decision and you can't really predict how it's going to go in football.
"Look at this season, Leicester are winning the league and Chelsea have had a bad season. You can't predict how it's going to go when you go somewhere."
Shelvey will certainly be thinking about what may have been as he faces up to playing Championship football next season.
However, with six games left to play his new side are not quite down yet and they will need to put in top performances from here on in to ensure they avoid the drop.
And if they are to do that, they will need Shelvey in the sort of form that earned him an England call up earlier in the campaign.