Kruse is an avid poker player and made it to the final table, finishing third, at the No-Limit 2–7 Draw Lowball event at the 2014 World Series of Poker on 18 June 2014, taking home $36,494 in prize money. In March 2016, Kruse was fined £20,000 and warned of his future conduct by Wolfsburg after it was revealed that he had lost £60,000 worth of poker winnings in the back seat of a taxi. This incident also caused him to be dropped from the Germany squad.