As for the World Junior, Sergei Zhigalko's win over Avetik Grigoryan put him in clear first entering the last round; previous co-leader Maxime Vachier-Lagrave could only draw against Ivan Popov. (As for the Americans, Robson lost and Lenderman won.) So Zhigalko has 10 out of 12, but can only guarantee first place with a last round win over Ivan Popov, though he'll also clinch the title with a draw and a non-V-L win against Dmitry Andreikin. Here are the leading last round pairings:
Zhigalko (10) - Popov (8.5)
Vachier-Lagrave (9.5) - Andreikin (8.5)
Olszewski (8) - Margvelashvili (8.5)
Iturrizaga (8) - Lenderman (8)
Yangyi Yu (8) - Grigoryan (8)
Only the first two are relevant to the battle for first, but there's the silver and bronze to be decided, too. Full pairings here, and full round 12 results here.