Froome has won the competition on four occasions, 2013, 2015, 2016 and 2017. Last year, the British missed the tour after crashing violently in training and sustaining several fractures of his right femur, several ribs and injured his pelvis.
By next year, it is clear that the 35-year-old will change stables to the Israeli Start-Up Nation.
This year's Tour de France was postponed by two months and starts on August 29 from Nice.