Symbol of the tennis ball

You can define a picture.

\documentclass{standalone}
\newcommand\tennisBall{%
  \setlength{\unitlength}{1cm}%
  \begin{picture}(1,1)(-.5,-.5)
    \put(0,0){\circle{1}}
    \qbezier(0,-.49)(0,0)(.4825,-.0850)
    \qbezier(0,.49)(0,0)(-.4825,.0850)
  \end{picture}%
}
\begin{document}
\tennisBall
\end{document}

enter image description here


Well, package fontawesome seems to be not longer maintained and therefore you can not add with LaTeX and this package an symbol for an ball into your document.

But you can use package fontawesome5.

The font shows the following ball symbols on the web page:

balls on fontawesome5

As you can see the symbol for an tennis ball is grey that means you have to pay for the fontawesome5 pro font to be able to use it. Only the black shown symbol are available in the free font version.

So you can try for example:

\documentclass{article}
\usepackage{fontawesome5} % <============================================

\begin{document}
\faTwitter

\faLinkedin

\faGithub

\faBasketballBall\ or \faIcon{basketball-ball} % <======================

\faBaseballBall\ or \faIcon{baseball-ball} % <==========================
\end{document}

with the resulting pdf:

pdf