Initial VIPR
3.8540
Registry seed
Current VIPR
3.8073
After latest rated game
Net Movement
-0.0467
Current minus initial
Record
8-8
50% win rate · 16 rated games
Storyline
Joel Lancaster entered VIPR with an initial registry rating of 3.8540. Across 16 rated doubles games, the player went 8-8 and moved -0.0467, finishing at 3.8073.
Why It Moved
AI-generated explanation: The 8-8 record produced +0.0476 from wins and -0.0943 from losses, for a net move of -0.0467. The biggest single-game impact was -0.0176 against David Roman as partner and Jerry Johnson / Ron Ahart as opponents. In game #13 on 2026-08-27, VIPR expected the player's team to have the edge, so the loss carried a larger drop: player team 3.4961 vs opponent team 3.1489.
Partner Chemistry
Partnership patterns are starting to emerge.
Joel's most common partner signals so far: Kevin Geraty (2-0, 100%), Sunil Sadhwani (1-1, 50%), Brian Wachtel (1-0, 100%), Jerry Johnson (1-0, 100%). No partnership has reached both the 8+ match and 75%+ win-rate marker yet, so treat this as directional.
Streaks & Rivalries
Rivalry
Joel has faced Kevin Geraty 4 times - record: 2-2. A close matchup worth watching.
Session Summary
| Date | W-L | Start | End | Net |
|---|---|---|---|---|
| 2026-07-02 | 1-3 | 3.8540 | 3.8326 | -0.0214 |
| 2026-07-09 | 3-1 | 3.8326 | 3.8402 | +0.0076 |
| 2026-07-16 | 1-3 | 3.8402 | 3.8056 | -0.0346 |
| 2026-08-27 | 3-1 | 3.8056 | 3.8073 | +0.0017 |
Game-By-Game Rating Trail
| # | Date | Result | Score | Partner | Opponents | Before | Change | After |
|---|---|---|---|---|---|---|---|---|
| 1 | 2026-07-02 | Win | 11-7 | Brian Wachtel | Pete Nikolakakis / Michael Marx | 3.8540 | +0.0087 | 3.8627 |
| 2 | 2026-07-02 | Loss | 0-11 | Michael Marx | Pete Nikolakakis / Matt Dame | 3.8627 | -0.0092 | 3.8535 |
| 3 | 2026-07-02 | Loss | 10-11 | Pete Nikolakakis | Brian Wachtel / Matt Dame | 3.8535 | -0.0102 | 3.8433 |
| 4 | 2026-07-02 | Loss | 8-11 | Matt Dame | Brian Wachtel / Michael Marx | 3.8433 | -0.0107 | 3.8326 |
| 5 | 2026-07-09 | Win | 11-8 | Kevin Geraty | Joe Spano / John Patton | 3.8326 | +0.0073 | 3.8399 |
| 6 | 2026-07-09 | Loss | 4-11 | John Patton | Joe Spano / Sunil Sadhwani | 3.8399 | -0.0063 | 3.8336 |
| 7 | 2026-07-09 | Win | 11-5 | Joe Spano | Kevin Geraty / Sunil Sadhwani | 3.8336 | +0.0012 | 3.8348 |
| 8 | 2026-07-09 | Win | 11-8 | Sunil Sadhwani | Kevin Geraty / John Patton | 3.8348 | +0.0054 | 3.8402 |
| 9 | 2026-07-16 | Win | 11-8 | Kevin Geraty | Robert McCollough / Sunil Sadhwani | 3.8402 | +0.0057 | 3.8459 |
| 10 | 2026-07-16 | Loss | 3-11 | Mathis Hediger | Sunil Sadhwani / Kevin Geraty | 3.8459 | -0.0140 | 3.8319 |
| 11 | 2026-07-16 | Loss | 1-11 | Sunil Sadhwani | Robert McCollough / Mathis Hediger | 3.8319 | -0.0110 | 3.8209 |
| 12 | 2026-07-16 | Loss | 4-11 | Robert McCollough | Kevin Geraty / Mathis Hediger | 3.8209 | -0.0153 | 3.8056 |
| 13 | 2026-08-27 | Loss | 8-11 | David Roman | Jerry Johnson / Ron Ahart | 3.8056 | -0.0176 | 3.7880 |
| 14 | 2026-08-27 | Win | 11-3 | Ron Ahart | Jerry Johnson / Roy Strasburg | 3.7880 | +0.0041 | 3.7921 |
| 15 | 2026-08-27 | Win | 11-2 | Jerry Johnson | David Roman / Roy Strasburg | 3.7921 | +0.0092 | 3.8013 |
| 16 | 2026-08-27 | Win | 11-2 | Roy Strasburg | David Roman / Ron Ahart | 3.8013 | +0.0060 | 3.8073 |
Formula Homework
These rows show the team ratings used in the adjustment calculation. The computed delta is the signed rating change produced by the current v0.6 formula.
| # | Player Team ( AVG ) | Opponent Team ( AVG ) | Winner-Loser VIPR Diff | Computed Delta |
|---|---|---|---|---|
| 1 | 3.8663 | 3.8202 | +0.0461 | +0.0087 |
| 2 | 3.8092 | 3.8386 | +0.0294 | -0.0092 |
| 3 | 3.8613 | 3.8550 | -0.0063 | -0.0102 |
| 4 | 3.8474 | 3.8231 | -0.0243 | -0.0107 |
| 5 | 3.6099 | 3.5155 | +0.0944 | +0.0073 |
| 6 | 3.4442 | 3.5788 | +0.1346 | -0.0063 |
| 7 | 3.9014 | 3.4237 | +0.4777 | +0.0012 |
| 8 | 3.5154 | 3.3432 | +0.1722 | +0.0054 |
| 9 | 3.6141 | 3.4532 | +0.1609 | +0.0057 |
| 10 | 3.5707 | 3.4216 | -0.1491 | -0.0140 |
| 11 | 3.5241 | 3.4899 | -0.0342 | -0.0110 |
| 12 | 3.6805 | 3.4759 | -0.2045 | -0.0153 |
| 13 | 3.4961 | 3.1489 | -0.3472 | -0.0176 |
| 14 | 3.4098 | 3.1765 | +0.2333 | +0.0041 |
| 15 | 3.3270 | 3.2976 | +0.0293 | +0.0092 |
| 16 | 3.4197 | 3.2726 | +0.1471 | +0.0060 |
Rating movement formula
Team VIPR = average - (average - lower partner) * CRF, with CRF = 0.40.
Adjustment = 0.02 / (1 + 10 ^ (2.5 * (winner team VIPR - loser team VIPR))).
Winning partners both receive +adjustment. Losing partners both receive -adjustment.
Score margin is recorded for context but is not currently part of the v0.6 formula.
First game check: winner-loser VIPR diff +0.0461 -> computed delta +0.0087; 3.8540 +0.0087 = 3.8627