Sanji v Queen
I think Sanji is gonna be on a time-limit against Queen given the later most likely fights using biological warfare. Moreover, the beast pirates don't exactly play fair, so even whilst Sanji is fighting Queen he might have to worry about the well being of others in the vicinity. To add Queen is built like a tank so he won't go down easy to blunt attacks and to make tings worse he seems to have a very high rate of recovery and there's also the strength of the ancient zoans combined with the fact that Queen is all muscle..lolz so even with the RS, Sanji might not have the luxury of taking so many hits from Queen so I expect it to be an uphill climb for Sanji for most of the fight. That said though, I'd say Sanji is a very good matchup against Queen due to his speed, maneuverability and CoO prowess. Plus there's his invisibility as well. I think what will decide this fight will be Sanji's fire abilities. If Sanji's blunt attacks are not strong enough to put Queen down, he might have to burn through it kinda like he did against Jyabura's tekkai. Something I really think could happen with this fight is Sanji awakening his sleeping genes particularly since Queen uses biological warfare. I mean a virus tries to break down your body from the inside and the only immediate defense your body has against it is your immune system and if your immune system isn't strong enough to fight of the virus, there's risk of death so if Sanji's immune system struggles with Queen's viruses, that might be the catalyst that awakens his sleeping genes
. Note that Luffy's immune system is already pretty monstrous given he survived Magellan but even he couldn't resist Queen's mummy virus.
Zoro v King
Rather than CQC per say, I think Zoro is really gonna struggle with King coz of the later's mobility and also the fact that the later can use fire. Zoro has pretty devastating attacks with a very large AoE but with Kings mobility, he won't have an easy time landing them. Then there's Kings fire which will be burning up the environment as the fight progresses. Zoro isn't immune to fire so unless he can cut it like Kin'emon can, he's gonna struggle. The fire might also impeded Zoro's vision making it a lot more difficult to fend off King's attacks. That said, the fact that Kin'emon can do it makes me think that Zoro will also be learning how to do it this arc which I think will be one of the turning points of this fight so akin to the Mr1 fight where he had to learn how to cut steel. Also I reckon we'd be seeing Ashura again for the first time in a long time prolly even an improved version of it. Would be sick if as opposed to Zoro's arms multiplying, we get a manifestation of Ashura itself kinda like Susano.