Mexican star Paulina Rubio has filed a court request seeking to ban the same lawyer from representing her ex-assistant in his abuse lawsuit and challenge her in a separate breach of contract case over a concert no-show.

The Latin singer is preparing to head to trial amid allegations she failed to honour a deal to play a concert for promoters CMG Entertainment in Tunja, Colombia in 2010.

She was slapped with more legal action earlier this month (Nov12) from her former employee, Felipe Restrepo Betancur, who claims he quit his job after Rubio reportedly attacked him during a flight from Miami, Florida in late October (12) because he had purchased her a seat in coach instead of first class.

It has since emerged that Betancur has hired Richard Wolfe - the same lawyer in the CMG Entertainment case - to help him win more than $250,000 (£156,250) in damages, and Rubio believes the assistant has been aiding trial prosecutors by leaking "case strategy and privileged documents".

The singer has requested Wolfe is banned from the Colombian concert dispute.

Wolfe tells Tmz.com, "There is no factual basis for the motion that was filed, because the actions alleged never occurred. This is their latest sleazy attempt to delay the trial. I fully intend to represent my client (CMG Entertainment) at the trial."

Rubio has denied the allegations stated in both cases.