Indoors the ball travels quickly and the bounce stays predictable, which rewards big serving and first strike tennis. Margins compress as a result: breaks of serve are scarce, tie breaks are frequent, and a favourite can lose without playing badly. Fatigue is the other theme, because the field arrives at the end of a long hard court run with places at the season ending event still to settle, so withdrawals are part of the picture. Games handicaps and set markets often hold more value than outright prices, and byes mean the top seeds enter a round later than the rest.
The Paris Masters is the last Masters level tournament of the ATP Tour season, played indoors on hard court. It uses a single elimination draw with byes for the leading seeds, and matches are best of three sets.
The draw thins quickly once the second half of the week arrives, and players can end up on court on consecutive days with little recovery between them. Nothing is lost to weather indoors, so the schedule holds and a late finish is followed by an early start. Watch second serve numbers and where returners stand, because that is usually the only lever against a server who is not being broken. Doubles carries its own subplot, with pairs still chasing qualification for the season finale.