The Bayern Munich midfielder says that the angry response that followed Pep Guardiola's withdrawal of him from Wednesday's game against Stuttgart was down to shock
With Bayern trailing 1-0, the reported Manchester United target was replaced on the hour mark by Mario Mandzukic, before goals from Claudio Pizarro and Thiago gave the league leaders a 2-1 victory.
Kroos threw off his gloves and ignored his team-mates on the bench when leaving the pitch for Mandzukic and then revealed exactly why he had responded in that manner in a post-match interview.
He told Bild: "I simply did not expect to be substituted. Of course I have to accept that. Plus, I was really angry we were behind."
The Germany international's contract expires in June 2015 and United have been linked after talks stalled over a new deal but Die Roten's CEO, Karl-Heinz Rummenigge, is adamant that the club want to keep Kroos and will work on a suitable deal.
"I hope we will reach an agreement with Toni. He is a player that we want to keep in general," said the Bayern chief.
“Now we have to see whether we will manage to get a contract that satisfies Toni and Bayern the same way."