Guruvi Tennis

Using Stats to Understand Why You Won or Lost a Match

When you beat someone who is at a comparable playing level to yourself, do you wonder if it was because you played better than you usually do? Or if you lose a close match, do you wonder if you just had an off day? What could you have done better to beat that opponent? You can answer these questions by looking at the statistics generated for your match by the Guruvi Tennis app.

For every match the app shows how your stats for that match compared to your career stats. The career stats are your stats averaged over the last 20 matches. The “vs. Career” column in the Match tab shows the difference between the match average and your career average. For example, if for the particular match the user’s 1st serve percentage is 66% and the career first serve percentage is 70%, then the “vs. Career” column will show -4% (negative 4 percent.)

App Screen Capture

Start by looking at the “vs. Career” column for the 1st and 2nd serve percentage. If these numbers are 10% or larger, then your serve in that match was much better than it usually is. If these numbers are -10% (negative) or worse, your serve was much worse than it usually is. Then look at the percentage of serve games won. Do your serve percentages help to explain why you won more or less serve games than you normally do?

Next look at the “vs. Career” column for percentage of points won and the percentage of points won on winners. If both of these are close to your career average then you played at your typical level. If the points won stat and points won on winners stat are both lower than your career average, then you played below your normal capability. On other hand if the points won stat is lower than your career average but the points won on winners stat is higher than your career average, this typically implies your opponent was better than the typical opponent you play against as the opponent lost much fewer points by making errors. The figure below shows the other possibilities. In the figure if your “vs. Career” column is 7% or higher it falls in the “high” category and if it is -7% (negative) or worse it falls in the “low” category, if it is within +/- 7% it falls in the “average” category.

Winners Diamond

Finally, look at your winners and errors breakdown for the match to determine if any of your shots were much better or much worse than usual. For each type of shot subtract the “vs. Career” error number from the “vs. Career” winner number (Winners - Errors.) If the result is 10% or greater, that type of shot was stronger than normal. If the result is -10% (negative) or worse, then that type of shot was weaker than normal. For example if the Forehand winners vs. Career number is 8% and the Forehand errors vs. Career number is -5% then the winners – errors result is 13% (8% minus negative 5%) implying that your Forehands were better than normal during this match. Use some of these techniques to analyze your matches and then figure out which areas to work on to increase your consistency and raise your playing level.