Meanwhile, Hearts captain Christophe Berra set aside renewed speculation linking him with a move to Wolverhampton Wanderers to praise the side's pre-season preparations.
Hearts have yet to appoint a new manager after a fruitless summer search.
But Berra told the Scottish Premier League club's website: "I've been three or four seasons and this is one of the hardest pre-season's we've done.
"In two or three weeks all the running will be finished and we will be fit and sharp and ready for the new season."
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