Graphs – Stats That Make Sense to Junior Tennis Players

I’ve always loved viewing statistics graphically. Be it for tennis, business or a stock price, graphs make a lot more sense than numbers on a screen. That’s because they tell more of a story than a list of numbers.

When it comes to junior tennis players, pure numbers on a screen make even less sense. What makes a lot more sense is producing those same stats graphically. At a glance, all the required information is there; showing areas that need work, areas that have improved and perhaps a few that are looking really good.

GT Stats Graphs

First to where you can find GT Stats graphing functionality. Any time you can see a graph icon like the one below, simply tap it to graph the information related to that stat.

Graph icon on the stats screen

At the time of writing, GT Stats produces the following vertical bar graphs by tapping on a graph icon on the main stats page:

  • Summary – displays Winners/Forced Errors and Unforced Errors for each shot by player.
  • Serves – displays first and second serve percentages and percentage won for each. See article.
  • Returns – displays forehand and backhand return Winners/Forced Errors and Unforced Errors by player.
  • Groundstrokes – displays Winners/Forced Errors and Unforced Errors by shot and player.
  • Volleys/Smashes – displays Winners/Forced Errors and Unforced Errors by shot and player.

There are two other very important graphs that GT Stats produces related to Error Location.

Firstly, by tapping the magnifying glass icon next to First Serve %, two pie charts will be displayed. These illustrate where each player’s first and second serves are landing when they don’t go in.

Secondly, by tapping the magnifying glass icon next to Unforced Errors, the Error Location stats screen will appear. Tapping on the Graph Icon will display a horizontal bar chart of where errors for each shot are landing. Note, this won’t include first serves as a fault is not an unforced error.

How to Use GT Stats Graphs

One thing that makes graphs stand out over numbers alone is their ability to display problem areas at a glance.

On the summary stats page, you would ideally have all green bars above the red ones. What you’re looking for is a graph that has a red bar dominating the landscape. It sticks out like a sore thumb in other words. When that happens you’ve likely got a problem area.

The same can be said for Error Location charts for unforced errors and for serves. Any bar or bit of pie that sticks out above all others is indicating a problem area.

The chart below illustrates this perfectly. If you’re viewing on a tablet or phone, tap the graph for a better view.

In the graph below, Player 2 has a long green bar next to forehand, indicating the number of forehands hit in the net in a rally of 3 or more shots. 7 combined for wide and long and a total of 11 in the net. It would seem Player 2 isn’t aiming high enough over the net or possibly not playing with enough topspin. That’s something coach and player can work on at their next session.

Unforced Error Location
Forehands missing in the net becomes even more problematic if Player 2’s forehand stats show a red bar above the green bar in the Groundstrokes graph ie more unforced errors off the forehand side than winners and forced errors.

The Future of GT Stats’ Graphs

GT Stats will be updated every month. This may include a new graph. Possibilities include:

  • First point of each game stats.
  • Important points such as 30-all and Deuce.
  • First and second serve percentages to Deuce and Ad side of the court.

To name just 3.

Additionally, users will have the ability to load a wider variety of stats down the track and select which stats they want to record for a specific match. Any match data can be graphed.

Once a new graph is loaded to the app, users will be able to see how the new graph looks on past matches, not just future matches.

If you have any questions regarding graphs or GT Stats, please let us know via our Contact page. To be notified of future updates, please Like our Facebook page.

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