#3 Barcelona would’ve won and retained the Champions League
No team, since the rebranding of "European Cup" to "Champions League" in 1992, has managed to retain the trophy – but if anyone has come close, it is Guardiola's Barca side of 2008-12. Having won the competition in 2009 and 2011, they fell cruelly short in 2010 at the semi-final stage, at the hands of Jose Mourinho's indomitable Inter Milan.
If Ronaldo had been added to the mix of Xavi, Iniesta, Messi, Fabregas, Pique etc – the golden generation of La Masia – that side would have established its dominance over any other side in football history even more firmly.
Just as with the hat-trick of La Liga titles from 2008-09 to 2010-11, Barcelona might have even have had a hat-trick of Champions League titles during the same period. Well, that would have been quite a hattrick of a double.
