Who is the greatest big match/clutch player?

[ankitj]

Many

So it would seem it's much easier to play clutch knocks in world cup finals than other games.

 

[subshakerz]

So it would seem it's much easier to play clutch knocks in world cup finals than other games.

No. There are more such knocks in other games too but the knockout games are more high pressure hence those are valued more.

 

[Coronis]

Didn't Bradman win an Ashes with a reverse sweep? Where Australia were down 0-2?

Yes.