At Battleground in July, Undertaker made his return by attacking Brock Lesnar as Lesnar was on the verge of defeating Seth Rollins during his WWE World Heavyweight Championship match, which caused the match to end in a disqualification win for Lesnar. The next night on "Raw", Undertaker explained his actions as revenge – not for Lesnar breaking The Streak, but rather the constant taunting he allowed Paul Heyman to engage in. Later that night, after Undertaker and Lesnar brawled throughout the arena and had to be separated, a rematch was scheduled for SummerSlam in August, where Undertaker controversially defeated Lesnar. Lesnar put Undertaker in a kimura lock and the timekeeper rang the bell after seeing The Undertaker supposedly indicating submission, but since the referee had not seen a submission and never stopped the match, the match continued. The confusion allowed Undertaker to surprise Lesnar with a low blow and apply "Hell's Gate", in which Lesnar passed out. At Hell in a Cell, The Undertaker was defeated by Lesnar in a Hell in a Cell match after Lesnar hit him with a low blow and executed the third "F-5" of the match.