Former Manchester United midfielder Owen Hargreaves has likened Chelsea to his former club's 1999 Treble winners.
Hargreaves is a great admirer of Jose Mourinho's men - who are chasing a historic quadruple this season.
"When I look at the Chelsea team it reminds me of how we were back in 1999.
"Our team was perfect.
"We had great skill, great athleticism, great physical strength. And we were ruthless, in a good way. Looking at Mourinho's side I see the same qualities - especially the ruthlessness.
"Jose doesn't let players get away with anything, but they respect and admire him for that.
"Louis van Gaal is also like that at Manchester United now. Too much accountability and being nice just doesn't cut it. Players will respond to tough bosses.
"Too much freedom and they take advantage."