It was a 1v1 with Roger, the most that I could see happening is Garp helping a little bit to give Roger the edge.
Roger was in his prime and had as much hype as Xebec.
In this chapter alone, Kaido and Garp only cared about Roger and Garp thought that the marines could handle Rocks without him. BM also gave Kaido a warning about Roger: “One thing at a time, rookie”. I interpreted that as you’re too young to give Roger a try, focus on the mission. Xebec and Roger’s interaction at the end also gives me rival vibes.