Pune: Newly anointed Sri Lanka head coach Mickey Arthur today spoke out against the move to reduce Test cricket to a four-day affair, saying the fabric of the longest format of the game should not be tinkered with.

"Look, five-day Test cricket is the way to go. Test cricket challenges you mentally, physically and technically and a result comes a lot of a time on the fifth day. We just witnessed a very good Test match [England versus South Africa] that finished on Day Five," said the South Africa-born coach ahead of his team's deciding T20 International at the Maharashtra Cricket Association Stadium in Gahunje here.