It was reported Slovenia had been angered by a lack of communication from United over Sesko's fitness after he suffered a knee strain in the draw at Tottenham.
But yesterday, Kek said: "Completely expected from the English media. But I emphasise once again: the moment communication was established between us and the Manchester United medical team, the problem was solved in five minutes.
"I thank the club for their cooperation. Our medical team checked their documentation. The matter was quickly resolved."
"I wish Benjamin a successful rehabilitation and a speedy return to the field, because everyone who knows him knows that he feels best there."
Slovenia meet Kosovo on Saturday night in their latest World Cup qualifier.
