Thapelo Morena is nursing an injury while Darren Keet is finalising his work permit in Belgium, which requires him to stay in that country until all the paperwork is done.
World number one Osaka overpowered 15-year-old Gauff 6-3, 6-0 in 65 minutes to keep her title defence on track before sharing a warm embrace with an opponent overwhelmed by the occasion in the New York spotlight.
Ntseki was appointed the coach on an interim basis three weeks ago following Stuart Baxter's departure last month.
The Lions will meet either the Cheetahs or the Sharks in the title decider next week.
United boss Ole Gunnar Solskjaer conceded his team lacked the killer instinct in the opposition half.
Trailing 11-20 at half time, the hosts scored 40 points in the second half, ending up with a total of seven tries to their name.
In a statement, the auto racing governing body said that Hubert, 22, died following a 'serious incident' at Spa-Francorchamps, a three-car pile-up in the second lap of the race.
With 27 Jaguares in the Argentina Rugby World Cup squad, the Buenos Aires-based Super Rugby side sent their reserves to compete in the second tier of the oldest national rugby provincial competition.
Hundreds of supporters gathered outside OR Tambo International Airport to see the Springboks off as they jet off to Japan for the Rugby World Cup on Friday.
The Boks will be competing for their third World Cup trophy when the tournament gets under way on 20 September.
