Avenatti is on tape; Geragos not, so far as has been reported.
Check out the March 21 meeting described in the linked announcement from the US Attorney. As stated therein, this meeting was at the direction of law enforcement, so it would have been recorded. CC-1 (allegedly Geragos) not only attended the meeting, but conferred with Avenatti before Avenatti made a further demand. Avenatti was taking the lead, but CC-1 was clearly in on it and would have received a portion of the payment if Nike had agreed.