| Tournament | Winner | % Correct |
|---|---|---|
| 2010 - Australian Open | Roger Federer | 99%
|
| 2012 - Wimbledon | Roger Federer | 98%
|
| 2013 - Wimbledon | Andy Murray | 97%
|
| 2012 - US Open | Andy Murray | 96%
|
| 2016 - Wimbledon | Andy Murray | 94%
|
| 2017 - Australian Open | Roger Federer | 94%
|
| 2017 - Wimbledon | Roger Federer | 94%
|
| 2018 - Australian Open | Roger Federer | 94%
|
| 2014 - Australian Open | Stan Wawrinka | 94%
|
| 2015 - French Open | Stan Wawrinka | 93%
|
| 2014 - US Open | Marin Čilić | 90%
|
| 2016 - US Open | Stan Wawrinka | 88%
|