Money That Never Appears on a Prize List
Prize money in tennis is heavily concentrated toward the closing rounds of the biggest tournaments. Players fund their own operation out of it: coaching, physio, travel, and often a parent or partner acting as unpaid staff. For most of the professional field, income is generated per event, which means the rational response to a thin bank balance is to enter more events, including small ones in weeks that a top player would treat as recovery time.
At the other end of the ranking, the pressure runs in the opposite direction but points the same way. Established names can earn appearance fees for turning up regardless of result, and exhibition matches in commercially valuable markets pay well for a short, low-risk commitment with no ranking consequence attached. Those events cluster in exactly the weeks that would otherwise function as an off-season, because that is when the calendar leaves room for them. Both ends of the ranking therefore face financial pressure to keep playing, for opposite reasons, and the nominal quiet period fills itself in.
