While being tied up, move the left stick up and down rapidly to cut the rope. Once you get the prompt, press circle to take out the guard who hit you then use that weapon to quickly kill the two other guards and disable Tommy Marcano. Interact with him to trigger a cutscene.
After starting the fire, you have to fight through the burning boxing stadium to make it outside. Unfortunately, there are a lot of Tommy’s men still inside and out to kill you. The smoke will make it very hard to see the enemies so make sure to use your intel view to get their positions and prevent them from flanking you. The good thing however, is that you’ll have your equipment back so you’ll have a fighting chance. Take cover often and move silently so the enemies won’t know when you’re flanking them. Moving to other positions silently will make the enemies attack the last spot where they saw you. Use this to your advantage, to get to a good position.
As soon as the escape sequence starts, expect a handful of welcoming party to intercept you. Make your way to the next doorway that leads to the ring’s balcony area where there are a lot of guys pinning you down. Use blind fire to rushing enemies then intel view to snipe the enemies across the room. After thinning their numbers a bit, use the path to the left to circle around the enemies and have the height advantage.
As you reach the other side of the balcony, more enemies will arrive. Use the cover and engage them. When the area’s clear, loot the medicine cabinet nearby. Follow the marker to reach the stairs. Go downstairs to reach the boxing ring level.
More of Tommy’s men are waiting there however the explosion on the left side will take them out. Look immediately to the right side of the ring and use grenades while the enemies are clumped together. Clear the incoming wave of enemies then use the counters and obstacles on the right side to head to the entrance. Take out the last few enemies there and finally, you’ll be outside.
Once outside, the police will be investigating. Use your Police Dispatcher associate to prevent them from investigating the area then hop on the vehicle there. Leave the area to complete the mission.