The 23-year-old Hannighofers broke her knee ligaments during pushing exercises and will have a rehabilitation period of several months after the operation.
In February, Hannighofers was crowned world junior champion in doubles. In the Adult World Championships, he won bronze in the doubles, conceding to Francesco Friedrich and Johannes Lohner.
He took part in only four races in the World Cup, winning third place in Innsbruck in December and finishing twice in fourth and once sixth in the other three stages.
The season will start in October, when bobsleigh and skeleton training is planned for the 6th to 27th of the 2022 Beijing Olympic Games in Yanchin. The Beijing Olympics will take place in February, but the athletes will score points in the World Cup qualifiers.
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