ATP Challenger uses jiaobei blocks for coin toss

The tournament has flipped the script on the way first serve is determined. (Twitter/ATP Challenger)

In Taipei, Taiwan players and fans at an ATP Challenger tournament are getting used to the sight of a new kind of coin toss. The umpires are deciding who serves first by throwing traditional jiaobei blocks.

Typically made out of wood or bamboo, the crescent-shaped blocks are normally found in temples and shrines as ways of communicating with the gods. If one block lands flat and the other block lands round, that means "yes."

Great Britain's Liam Broady told the ATP website, "I've played matches in countries across the globe. I've seen all kinds of coins and currencies used to decide who serves first, but never the traditional wooden pieces used here in Taipei."