Uber has lawyered up in a big way to fend off an antitrust challenge from defunct ride-hailing app Sidecar. The company has brought on a team led by Theodore Boutrous Jr. of Gibson, Dunn & Crutcher to defend the suit filed last month by Sidecar successor SC Innovations Inc., or SCI.

According to court papers filed Monday, the Gibson Dunn lawyers intend for their first order of business to be an attempt to disqualify SCI’s lawyers at Quinn Emanuel Urquhart & Sullivan.