The secret files called the Zacharis Dossier may cause a war between the East and the West. In order to obtain a painting that is supposed to be the hiding spot for these files, Loid and Fiona enter an underground tennis tournament run by the owner of the painting, Campbell. If they win, the art piece they're after will be presented. Loid and Fiona enter as a married couple and play various skilled players including pro players!
so let's be on our guard, just in case 
they try to do something underhanded.
لذلك علينا أن نكون متأهّبين في حالة
.ما إذا حاولا فعل ما ليس في الحسبان
nous devons faire attention
aux pièges qu’il nous tendra.
dobbiamo stare in guardia, 
potrebbero usare metodi poco puliti.
então vamos ficar alertas
caso eles tentem algo ilegal.
К матчу надо подойти с осторожностью,
стоит ожидать подлостей.