When Barcelona signed Thierry Henry from Arsenal they had a decent idea what they were going to get. Goals, flair, ego.
They had no idea that on February 23, 2010 his very introduction as a substitute would play a massive part in his side being denied an away win in Stuttgart in their Champions League second round tie.
With the game delicately poised at one apiece, Pep Guradiola brought on Henry to try to capitalise on Barca's growing momentum. It looked like a master stroke as the pressure mounted