Competitor Research and writing content for website

I specialise in eSports and eGaming sectors. I wish to target new clients in the eSports and eGaming sector specifically digital creative agencies whose clients are major brands.

Digital creative agencies tend to specialise in specific sectors such as retail, medical, finance - I am seeking a list of ten agencies that specialise in eSports and eGaming.

The agencies I am seeking will be competitors with my current main digital agency client.

I would then like the current website content update to focus on our expertise in eGaming and eSports.

Finally, I would like ideas on how to target these ten agencies for legal work.