All the rules for the Top 20 bet can be found here.
In progress
Barcelone Open
Leader(s): Mimile
Munich Open
Leader(s): crush
Open de Roumanie
Leader(s): Paulinugo
LLTL
ATP
WTA/Double
Yearly
Race
attente
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=>
Rookies
Leaderotron
Mega Patate
Big Lose
Clay
Grass
Hard indoor
Hard outdoor
attente