The heavyweight boxer was training with coaching staff at the WWE Performance Centre in Orlando, Florida when Strowman charged into the ring, knocking his future opponent to the floor.
The 6ft 8in 'Monster Among Men' appeared to have completely blindsided the Brit, who was in the middle of training for his in-ring debut next week when he was sent flying.
While the Gypsy King managed to stand up, he was left clutching his right ankle and there are fears he is now carrying an injury with just days to go before the pair showdown in Saudi Arabia.
A laughing Strowman was quickly ushered from the building as he yelled at his opponent "you're in my world now", with Fury only able to watch on from the side as he attempted to hobble after him on one leg.
It is the latest incident in a long line of drama between the pair, as the two rivals rack up the tension and hysteria ahead of their bout.
Fury is set to make his WWE debut on October 31 at a pay-per-view Crown Jewel event, with the recent attack adding to the storyline between the pair.
The two first clashed earlier this month during the first SmackDown, with Fury at the event as a spectator before getting involved in some orchestrated beef with Strowman and fellow wrestler Dolph Ziggler.
The hysterics continued on Raw as Fury and Strowman had to be separated by security in the ring after a shouting match, with other wrestlers joining in.
At a recent press conference, it was confirmed the heavyweight and self-professed "lifelong WWE fan" would step into the wrestling ring.
WWE executive vice president Paul Levesque, more commonly known as Triple H, said: "Braun Strowman will step into the ring with the man who is undefeated in 30 fights, the 6ft 9in 'Gypsy King', Tyson Fury.
Fury would not be the first boxing star to appear in a wrestling ring. Mike Tyson served a special ringside enforcer for ‘Stone Cold’ Steve Austin vs Shawn Michaels at Wrestlemania XIV, making the three count as the Rattlesnake won the WWF Championship before dropping Michaels with a right hook.
Floyd Mayweather was also involved in an angle with The Big Show in 2008, breaking the 7ft giant’s nose before their meeting at Wrestlemania 24.
Fury is set to meet WBC heavyweight champion Deontay Wilder in their hugely anticipated rematch in February – providing Wilder comes through another rematch with Luis Ortiz in November.