Mars, being geared unlike Earth, paid little attention to the Envoy and the Champion.  The two events had happened too recently to be of significance - if Martians had used newspapers, one edition a Terran century would have been ample.  Contact with other races was nothing new to Martians; it had happened before, would happen again.  When the new other race had been thoroughly grokked, then (in a Terran millennium or so) would be time for action, if needed.