2. Jorge Andrade being sent off for allegedly kicking the ball at a Porto player in the semis.
3. His accusations toward Anders Frisk caused the referee to retire after angry Chelsea fans made death threats.
4. Ricardo Carvalho pulled down Victor Valdes as John Terry headed the ball into the Barcelona goal in the second leg at Stamford Bridge in 2005.
5. Chelsea prepared a sandpit for Barcelona in the first leg at Stamford Bridge in 2006.
6. Asier Del Horno should have been booked for a studs up challenge on Lionel Messi before he was shown a direct red for kicking the ball onto him after the referee had already blown the whistle.
6. Chelsea got a penalty in the second leg even though there was no foul on John Terry.
7. Michael Ballack should've been booked for a foul on Thierry Henry in the first leg of the semi-final in 2009.
8. The aforementioned foul was in the penalty area and would have resulted in a penalty and Barcelona most likely going into the second leg with a lead.
9. Eric Abidal was wrongly sent off in that game after Anelka tripped on himself.
10.Diego Milito's goal in the first leg of the semi-final in 2010 was offside.
11.Thiago Motta elbowed Sergio Busquets. Even if Busquets hadn't made a meal of it, that was a red.
12.Barcelona had a goal ruled out because Toure was deemed to have handled the ball, even though he had no time to avoid it.
13.Pepe should have been sent off in the Copa Del Rey final.
14.Sergio Ramos got booked for elbowing Lionel Messi.
Edit: I had got the first one wrong. Porto's goal at Old Trafford was fine, it was United who had a goal disallowed even though Scholes was atleast a metre onside. Props to Rohan the United supporter for pointing it out.