The need for the parts of an engine to fit together tightly enough to stop hot gases seeping where they should not, and yet not so tightly that they rub on each other in a way that wears them out, is a constant bane of engine designers.

ECONOMIST: An engine made of water

It will infuriate those who advocate technology, and they should not have been out, but at the moment it is the rub of the green and neither batsman would have played different shots.

BBC: Jonathan Agnew column