This is about what I expected. Kizaru's too fast for Luffy to get too many hits in and has better endurance. Gear 5 is too strong for Kizaru, and if Luffy gets a strong hit in, Kizaru takes serious damage.
Really thought Kizaru would be our introduction to Logia Awakening, though.
Since Saturn and the Marines are busy, Kizaru vs Luffy fighting seriously, rather than having a chase sequence, is possible.
If Luffy and Kizaru do resume fighting, I assume Zoro will interrupt at some point, so Luffy can face Saturn.
Luffy should be up soon, just needs some digestion, lol.