Fantasy tennis, engineered for the serious fan.

The full UbiTennis mobile app was redeveloped in React Native, replacing the FlutterFlow codebase while retaining the existing Firebase backend. Backend modifications were made to support the new Fantasy Tennis data architecture, new API integrations, and the UbiCoin economy layer — with full data migration ensuring existing users experienced no disruption.

The platform is driven entirely by live ATP API data — requiring zero manual tournament management by the operator. The system pulls tournament IDs, names, categories, start and end dates, official entry lists, ATP ranking snapshots at team-open time, real-time match results, and match statistics (aces, duration, sets) — all automatically, for every ATP tournament across 250s, 500s, Masters 1000s, Slams, and the Finals.

A sophisticated dynamic pricing engine was built to prevent all-top-player teams and ensure genuine strategic variety across every tournament. The algorithm takes the full entry list, sorts players by ATP ranking, and auto-assigns them to six tiers relative to that specific tournament's field. Pricing within each tier follows a power curve formula — Price = round(minPrice + (maxPrice - minPrice) * (1 - x)^2.2) — producing fair, differentiated prices that adapt automatically to whether the tournament is a 32-player ATP 250 or a 128-player Grand Slam. No manual price updates are ever required.

Users build a 6-player team within a 100-credit budget, selecting at least one player from each tier. Teams open 3–5 days before the tournament and lock automatically at the first match. Post-lock, teams are frozen — withdrawal management handles player changes automatically without user intervention.

A fully automated withdrawal engine handles player withdrawals at every stage of the tournament lifecycle. Before lock, withdrawals are detected via API, the user is notified, the player is auto-removed, and credits are refunded for replacement. After lock but before a match, the system automatically replaces the withdrawn player with the next available ranked player — or the closest-price alternative if none is available. During a match, the withdrawn player scores zero with no replacement.

A structured points system awards base points by round (1 point for R128/R64 through to 13 for the Final) with five automatic API-driven bonuses: Upset Bonus (+3 for beating a player ranked 15+ places higher), Fast Win (+2 for winning in under 60 minutes), Sharpshooter (+2 for 10+ aces), Ruthless (+2 for a 6–0 set), and Straight Sets (+1 for a 2-set win outside Slams). All bonuses are computed automatically from live match statistics.

Unused budget credits (up to 10 per tournament) convert automatically to UbiCoin at a 1:1 rate. Users also earn UbiCoin through daily quizzes and achievements. UbiCoin can be spent on tactical advantages — Spy Mode (8 coins: see an opponent's team before lock), Quiz Second Chance (3 coins), and exclusive badges, avatars, and profile titles. UbiCoin never buy points — maintaining competitive integrity while rewarding engagement.

A daily quiz feature was built with a 15-second per-question timer, automatic question locking on timeout, and topics covering daily ATP matches, historical tennis trivia, and player stats. Correct answers reward 3–5 UbiCoin, with a one-time second-chance option costing 3 UbiCoin.

Leagues are created once and persist for the full ATP season (January–December). Public leagues are open to all; private leagues use invite codes. Each tournament generates a fresh league ranking while the season total accumulates across all tournaments. Tie-breakers are resolved by tournament points, upset count, credits spent, and team creation timestamp — in that order. Members who don't participate in a tournament receive 0 points and a "Did not participate" badge.

Three parallel ranking systems were built: a global tournament ranking across all users, a per-league tournament ranking computed on read, and a persistent global UbiCoin ranking tracking virtual currency accumulation across the season.