Conversation so far:
When was Donnie Yen's first fight?
At a young age, under the influence of his mother, Donnie Yen developed an interest in martial arts and began experimenting. Yen then started kung fu when he was nine
What style of fighter was Donnie Yen?
Donnie Yen showcases being well-versed in Tai Chi, Boxing, Kickboxing, Jeet Kune Do, Hapkido, Taekwondo, Karate, Muay Thai, Wrestling, Brazilian Jiu-Jitsu, Judo, Wing Chun, and Wushu.
Who claimed the statement that Donnie Yen would be a good practical fighter?
World Boxing Heavyweight Champion Mike Tyson, who worked with Donnie Yen in Ip Man 3, claims that Yen is an incredible martial artist and would do well in authentic combat.
Did Donnie Yen fight Mike Tyson?
Crew members were afraid that Mike Tyson, retired professional boxer would injure Donnie Yen. It was ultimately Yen who fractured Tyson's finger while using his elbow to block Tyson's punches.

Question: When did he fight Tyson?
Self-contained rewrite: When did Donnie Yen fight Mike Tyson?