Daisy chain zigbee and motor controller UART/TTL

I’m currently looking into using a zigbee module to wirelessly communicate with my arduino uno. It seems that the zigbee module uses the TX and RX serial/digital ports on the arduino. But currently the motorcontroller choice uses those ports as well. Is it possible to daisy chain the two devices? I think the motorcontroller supports some sort of daisy chaining, a pololu protocol (the motorcontroller is by pololu).