Partnership law expert Leslie Corwin is being sued by an attorney he represented who claims Corwin mishandled an arbitration with the attorney’s former firm.

Allen Roberts, a partner at Epstein Becker & Green, sued Corwin and his firm, Greenberg Traurig, in October, claiming they were negligent in failing to prove liability against Roberts’ former partners at New York employment boutique Roberts & Finger. Roberts is seeking more than $6.6 million in damages. (See the complaint.)