Being mad football fans, we were always going to go to a Legia game when we were in Warsaw. We arrived on the Friday with their game against Slask Wroclaw the next day but didn't have any time to get tickets so would need to go down on the day of the game.
We went down to the stadium for 11am to see if we could get any tickets for the game. With Legia being a big club we thought this may prove difficult but it was simple. We bought tickets for the most expensive seats in the stadium (£25) and I can definitely say we got our money's worth.
I have been to many games in my life that have had amazing atmospheres (Champions League nights, Turkish games) however, I must say that this is the best atmosphere I have came across. From the first second to the last we heard song after song from the Legia ultras. We also thought that we may get some trouble due to us being foreigners but everybody was kind towards us.
Would say to any football fan that this is a must do activity if there is a game on during your trip.