We do not need reminding that it was Australia's unsteady performance in the one-day matches which preceded the 2005 Ashes that destabilised Ricky Ponting's team, and any early blows struck here might seem important at the time.

BBC: Jonathan Agnew column

Aggression in golf would work against performance because it would only raise the heartbeat excessively and cause an unsteady hand.

BBC: Why are tennis players so badly behaved?