Actually, looking at the replay now, when trying to control the ball Cruz clearly tripped Legro, stuck his leg out in his path, thats why Legro went down.
Well i dont want to say it, but both changes: Gio going upfront and Tiago for trez in mid... or IQ for Trez..... both look much suiter for the occasion.
Like somone said.... i would give trez 15 mins..... but at this pace even thse 15 mins could be fatal.