Xander wasn't even halfway worried about Buffy. He was overly confident about her slaying abilities, he always had been. While he might have spared a glance in her direction every now and again, Xander usually found himself spending most of his time trying to keep himself from having his brains bashed in. Because that would be bad.
His punches were being pushed at full force. Compared to vampire strength, it wasn't all that much to brag about. But since he had lost his cross in the scuffle, Xander had to do something to distract while he tried to find an opening for his handy dandy stake.
He dodged a kick, but the punch that was delivered toward his chin hit home. Xander grunted in annoyance as he stumbled back. That was gonna leave a mark. Throwing himself to the right, Xander avoided another punch to the head and managed to swing himself around the vamp from the back. He took advantage of that and staked the sucker right through the shoulder.
Then he turned around to take on another. Unfortunately, he wasn't quick enough to avoid being grappled around the throat by a pair of strong, pale hands.