Sebastien Haller returns for Borussia Dortmund in friendly after testicular cancer battle

FILE - Ajax's Sebastien Haller celebrates scoring his side's second goal during the Champions League group C soccer match between Besiktas and Ajax at the Vodafone Park Stadium in Istanbul, Turkey, Wednesday, Nov. 24, 2021. Ivory Coast striker Sebastien Haller is back in training at Borussia Dortmund after nearly six months away from soccer with testicular cancer. Haller posted pictures Monday, Jan. 2, 2023, of himself training in the gym at Dortmund and said 2023 will see him return to the field. (AP Photo, File)

Less than six months after he was diagnosed with testicular cancer, Sebastien Haller was back on the field for Borussia Dortmund on Tuesday in a friendly game.