1. Manchester United (1999)

Highlights
a. Won the UCL by defeating Bayern Munich in the finals 2-1
b. Won the FA cup by defeating Newcastle in the finals 2-0
c. Won the EPL with 79pts, just one adrift Arsenal of 78

Coach: Sir Alex Ferguson
Top scorer: Dwight Yorke (29 goals; all completions)
Best player : David Beckham (2nd best in both ballondor and world best player to Rivaldo); Dwight Yorke (EPL best player)

Manchester United is the first and only EPL team to win the standard treble

2. Barcelona (2009)

Highlights
a. Won the UCL by defeating man utd 2-0 in the finals
b. Won the Copa dey Rey by defeating Atletico Bilbao 4-1 in the finals
c. Won the league with 87 pts, with Madrid 2nd with 78pts

Coach: Pep Guardiola
Top scorers: (Etoo 30 gls- laliga; Messi 38gls- overall)
Best player: Messi ( won both ballondor and FIFA best )

Barcelona also win the sextuple, and also the first and only laliga side to win the standard treble


3. Inter Milan (2010)

Highlights
a. Won the UCL by defeating Bayern Munich 2-0 in the finals
b. Won the Copa Italia by defeating Roma 1-0 in the finals
c. Won the SerieA with 82 points with Roma in 2nd with 80 pts

Coach: Jose Mourinho (the special one, the only one)
Top scorers : Diego Milito (30 all competitions)
Best player: Diego Milito (SerieA best player); Wesley sneijder (4th in FIFA ballondor)

Jose Mourinho became the first coach to win the FIFA best men coach of the year. Inter Milan became the first Italian side to win the standard treble.


4. Bayern Munich (2013)

Highlights
a. Won the UCL by defeating Dortmund 2-1 in the finals
b. Won the dfb pokal by defeating Stuttgart 3-2 in the finals
c. Won the bundesliga with 90 pts followed by Dortmund with 71 pts

Coach: Jupp Heynckes
Top scorer: Thomas Muller (23 goals all competitions); Mario manduzkic (15 gls, league)
Best player: Bastian Schweinsteger (League best player); Franck Ribery (3rd in ballondor)


5. Barcelona (2015)

Highlights
a. Won the UCL by defeating Juventus 3-1 in the finals
b. Won the Copa dey rey by defeating Atletico Bilbao 3-1 in the finals
c. Won the league with 94 pts, with Madrid in 2nd with 92 pts.

Coach: Luis Enrique
Top scorer: Lionel Messi (58 all competitions; 43 laliga)
Best player: Lionel Messi ( FIFA ballondor best player, laliga best player)

Barcelona became the first team in the world to win treble twice

Cc. Lalasticlala
Mynd44

Barcelona!!!!

Inter's triple of 2010 remain the most outstanding for me.
Op please verify, Inter won the UCL final against Bayern 2 goals to nil

linked:
Inter's triple of 2010 remain the most outstanding for me.
Op please verify, Inter won the UCL final against Bayern 2 goals to nil

Thanks... Modified

The best club in the world.

Winning the sextuple. Messi the best in those two campaigns.

Greatest player ever

Barcelona

Man utd treble is the best, considering the fact there were better teams in the start of the millennium than what we have now....

And doing it with the least quality players than the other treble winners

Barcelona all the way. The stats speaks for itself.

Mourinho's inter team of 2010 won the best team of the century (Barcelona of 2010) in the champions league semi final. Note that the barca team was not having a bad day. The played unbelievable football but the inter team were super humans. Inter won the on aggregate 3-2.

That team is the most rugged team in modern history.

I go with Mou inter... resilient team...stop Barca from winning back to back 3ce, while winning their own treble

Barca cheated Chelsea in the 2009 semi finals with ovrebo...

Inter Milan (2010)
Man utd (1999)
Barca (2015)
Bayern (2013)
Barca (2009)

in that order for me

You have to acknowledge that Manchester city won the treble last season.