Ellipse chart in R


I have a data frame with the following :

Sales Team|Appointments #|Closed Sales #|Month

For a given month I would like to create the following chart type :

Imagine a scatter chart plotting Appointments on the X and and Closed Sales on the Y for each Sales Team.

Now imagine an ellipse covering the minimum area that covers all points. I don't need to display the scatter points themselves other than the centre point of the ellipse.

Is there a chart such as this present in R?

Thanks in advance,