Barcelona 2007-2010 Milan 2002-2007 That you gave them more years than others shows their dominance. Also had a great help to their nations world cup successes. Man United 1999 Slightly before my time but the treble has never been done since in England. I think Inter are the only treble winners i've not listed but theirs was arguably more fortunate and less impressive, I like Inter but it was not a memorable a team as others on the list. Bayern 2012-13 Beat a still great Barcelona team 7-0 over two legs, exciting to watch. Atletico 2013-14 Bias pick as they are my second team but everyone knows how dominant Barca and Real were and what Atletico did this year was amazing. Such hard work to fight for top trophies thought beyond them. Arsenal 2004 is an honourable mention.
Sao Paulo 2005-2008 1 Lib 1 CWC 3 Brasileirao Back to back to back.. Internacional - 2006-2010 2 Lib 1 CWC 1 Copa Sudamericana 2 Recopa Sudamericanas