Karch Kiraly and the American women have made an improbable run to the top of Group 1.
Brazil and Team USA won their matches on day one of week three in the World Grand Prix.
The FIVB World Grand Prix is over half over, with many teams collecting large amounts of money so far in the tournament and have the potential to earn much more.
After a 3-3 start, Brazil begins the last week heading into the final six with a match against Belgium.
Argentina outscored Serbia and had help from 44 errors, but the Serbians rallied for the five-set win to stay atop Pool G.
Russia is in the driver’s seat for Pool E after topping Poland via sweep on Wednesday.
The Dominican Republic, in spite of being in 8th position, have a pretty clear path to the Final 6.
Russia edged Turkey in four sets in an fairly even match, while Poland blew out Brazil with help from offensive and blocking prowess.
Serbia’s Katarina Lazovic, the leading scorer on opening weekend, paced her team to a Round 2 sweep, while Anahi Florencia Tosi piled on 21 points in Argentina’s 3-0 win over Mexico.