The sports industry’s leading data scientists make up Stats Perform’s world-class AI team. Find out how Stats Perform continues revolutionising sports through technological advancements.
The Stats Perform AI Team leverage advancements in artificial intelligence and machine learning to develop new levels of sports innovation.
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Hoang Le, Peter Carr, Yisong Yue and Patrick Lucey’s 2017 entry titled “Data-Driven Ghosting Using Deep Imitation Learning” utilised player and ball tracking to analyse player decision making, specifically in defensive situations.
Our work showcased an automatic “data-driven ghosting” method using advanced machine learning methodologies called “deep imitation learning”, applied to a season’s worth of tracking data from a recent professional league in soccer. Our ghosting method, which avoids substantial manual human annotation, results in a data-driven system that allowed us to answer the question “how should this player or team have played in a given game situation compare to the league average?”
Our team members Panna Felson, Sujoy Ganguly, and Patrick Lucey’s presented our paper “Where Will They Go? Predicting Fine-Grained Adversarial Multi-Agent Motion using Conditional Variational Autoencoders” at the 2018 European Conference on Computer Vision.
In our paper, we presented a technique using conditional variational auto-encoder which learns a model that “personalises” prediction to individual agent behaviour within a group representation. Given the volume of data available and its adversarial nature, we focused on the sport of basketball to show that our approach efficiently predicts context-specific agent motions. We found that our model generates results that are three times as accurate as previous state-of-the-art approaches (5.74 ft vs. 17.95 ft).
Each year Stats Perform’s AI team attends MIT’s Sloan Sports Conference to showcase our latest innovations in sports technology. Our 2017 entry from Panna Felson and Patrick Lucey titled ““BodyShots”: Analysing Shooting Styles in the NBA using 3D Body-Pose Information” developed a novel attribute-based representation of basketball player’s body pose during a three point shot.
Using Pearson’s Chi-squared test to quantify differences in attribute distributions for made and missed shots, we observed statistically significant differences in distributions of attributes describing the style of movement, e.g., walk, run, or hop, in various phases of the shot.
The paper includes a case study on Stephen Curry, where we observed that Curry moves much more than the average player in all phases of his shot and he takes a higher proportion of off-balance shots compared to the average player.
Sketching plays is a universal way for coaches to communicate what they want their players to do. What if a coach didn’t have to rely solely on intuition, but could instead foresee how the defending team is likely to respond to the intended play? For the 2018 MIT Sloan Sports Conference Thomas Seidl, Aditya Cherukumudi, Andrew Hartnett, Peter Carr and Patrick Lucey did just that.
In our work, we considered play sketching from a data-driven perspective. We combined a powerful analytics framework built on deep-imitation learning with an intelligent and highly intuitive user interface. Users freehand sketch plays or modify existing tracking data. Our software then inferred the equivalent animation and synthesised realistic “ghost” defenders. Users tested their plays against different teams and game contexts, and fine-tune sketches to maximise the expected points in a given situation.
Late in the 2018 Champions League Final, a key substitution resulted in an 83rd-minute goal to give Real Madrid the victory over Liverpool. The match result prompted several world-record-breaking goalkeeper transfers across multiple European leagues.
The high-profile transfers prompted the question, “how can you compare the performance of different goalkeepers across teams and leagues, when they don’t have head-to-head matchups or common opponents?”
Our AI team utilised spatial and body-pose data to bring deep, objective insights to the conversation and determine the best fit for clubs.
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