Being Tok'ra, Martouf was capable of amazing arrogance. And if he let Lantash take over, the symbiote could travel to heights of it that even Martouf himself couldn't reach - something that was proved when Lantash spoke internally to him after Chris's comment, telling him that if they had truly been impressive at fight night, they would have won instead of losing to some crazy man with an odd accent. The Tok'ra weren't just trying to do a good job - they had to do the best if they were going to overthrow the Goa'uld and destroy them.
Martouf smiled slightly at Chris.
"I'm told we should have done better," he said, tempering Lantash's words a little. Lantash didn't speak much anymore, allowing that to Martouf so that he would not make these humans uncomfortable. "That if our fight was impressive, we should have acutally won it."
Of course, using 'we' pronouns was something he didn't think about much, but that would certainly sound weird to others.