The Sydney-born fighter, who has held a world title at featherweight, moved up to make his welterweight debut having only been confirmed as Khan's opponent last month.
It was a disappointment to see British-Pakistan boxer Amir Khan's fight with Indian boxer Neeraj Goyat being cancelled, but boxing fans have something to rejoice since the former has won the match against Australian Billy Dib.
The first knockdown came from a left hook in the second round that landed right on Dib's face. The and speed of Khan, and his overall size, was too much for Dib to deal with.
A speedy, powerful combination of body shots from Khan sent the challenger crashing to the canvas - at which point his corner threw in the towel.
Just minutes after his fourth-round stoppage victory at the King Abdullah Sports City stadium in Jeddah, Khan said: "I felt very comfortable in there".
Sara Ahmad, 26, a Saudi fan of Khan said: "We all can see the time and effort that the Saudi government is spending to bring an incredible sport event here".
Is the Samsung Galaxy Note 10 coming with a new chipset?
Common industry specs now include USB Type-C charging, Bluetooth 5.0 for Low Energy, and the 3.5mm headphone jack. The charger might also work on some new mid-range Samsung phones that could support the same charging speed.
Crude futures fall after strong build in US oil products stocks
Distillate inventories grew by 6.226 million barrels for the week, while inventories at Cushing fell by 1.115 million barrels. Net U.S. crude imports were marginally higher, rising 44,000 bpd, while exports alone fell about half a million bpd.
S. Korean business owners call for boycott of Japanese goods
Japan's position is that these issues were resolved at the normalization of diplomatic ties with South Korea in 1965. Instead, Japan has cited "inadequate management" of sensitive items exported to South Korea.
Khan reunited with strength and conditioning coach Alex Ariza for this fight and hired new trainer former world champion Bones Adams.
The 32-year-old from Bolton was back in the ring for the first time since his controversial WBO welterweight title defeat to Terence Crawford in April. "Hopefully we come back again at the end of the year and bring Pacquiao here", he said. Whenever I fight I always make it exciting, I always make it very interesting.
"I slowed myself down a little bit instead of rushing all the time", he explained.
Pac-Man fights next weekend against undefeated Keith Thurman at the MGM Grand in Las Vegas.
But this was an altogether different level and given Khan's skills, it was not hard for the 32-year-old to look impressive at what had been dubbed the "Red Sea Fight Night" extravaganza.