Glenn McGrath's bowling tips for experts

1: Be tall.

2: Land six balls out of six, three inches outside off-stump. When you hit the seam, the ball should strike the very top of off-stump if it goes one way and should find the edge of the bat if it goes the other way.

It's sometimes helpful to identify a particular blade of grass to aim for. That way you know at what exact fraction of a picosecond to release the ball.

Don't worry if you're out by a millimetre or so - it'll keep the batsman guessing and you can also make the most of any uneven bounce.

3: If the pressure's on and you need to restrict the flow of runs, apply steps one to two.

4: If the pressure's on and you need to take wickets, apply steps one to two.

Also see Glenn McGrath's bowling tips for beginners