With the showdown commencing, Sasuke watches as his two opponents would get in a single file line before rushing forward. He didn't exactly know what they were trying to accomplish, as he could easily see Lazuli's chakra network just behind Lapis' as they charged towards him. You can't fool these eyes..!! Just as they would get within range, Sasuke would unsheathe his wakizashi. Seeing how Lapis would bend his knees to shift his whole body downward, Sasuke can only assume that he would be attempting to perform a quick sweep. In response, the young Uchiha swiftly points his blade down, before driving it into the ground. Should the timing be right, the blade would pierce through Lapis' jeans [Not his actual leg] and stop his sweeping movement.
Simultaneously, Sasuke would jump 1m upward with his right hand resting on his sword's pommel. As he's doing this, Sasuke would quickly twist his waist to the right, while extending both of his legs [He's off the ground at this point]. Swinging his legs to his right, his right leg would collide with Lazuli's left hand as she came in for a punch. Although it would hurt a little, Sasuke would force the struck leg to continue moving to the right, also forcing 18's hand out of the way. Still moving in the same direction, the Uchiha would tuck in his left leg, before delivering a swift kick to 18's chest – Causing her to be pushed back a few meters.
Pushing his left hand off of his wakizashi to gain some distance between Lapis and himself, Sasuke removes two kunai tagged with explosives. Upon doing so, he would hurl them towards 17's immediate area and soon triggers them to explode. If not defended against, Lapis would be blown to smithereens.