Opening strike, blocked/evaded.
Doflamingo Counters with 5 Colored Strings
A Final Attack ends the initial confrontation, and the fight is interrupted
Some elements are more 1-1, with Sanji and Luffy both failing at landing a barrage attack.
In fact, this scene seems written to answer "how did Doflammingo block Sanji with his coat" the same way Oda did for abilities he initially keeps hidden. If you recall, Doflamingo never shows Color of Arms before this, even when kicking Fujitora's sword. For another example, see Nico Robin's initial introduction vs her repeating the same scene again with powers showed, or Bartolomeo's initially invisible shields.
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