Spartak Saint-Petersburg, Pinar Karsiyaka,
The four sides are off to 3-0 starts in the EuroChallenge Last 16 and have one foot in the Quarter-Finals.
It is, perhaps, a little surprising that another outfit is not 3-0, or even 2-1.
That club is Lokomotiv Kuban.
Led by Lithuania's national team coach, Kestutis Kemzura, and stocked with talented players at every position, the Krasnodar outfit lost for the second week in a row on Tuesday night.
Lokomotiv took their foot off the pedal in the fourth quarter and paid the price, falling 67-66 at BK Prostejov.
The visitors went in front at 59-48 with 6:46 to play on a dunk by Maxim Sheleketo but didn't close out the win.
Eugene Lawrence capped an unlikely comeback with a free-throw just one second from the end for Prostejov.
Kemzura didn't make any excuses.
"It just one more time proves the unwritten rule that you have to win on the court and you have to play hard for the whole 40 minutes, not just parts of the game," he said.
Lokomotiv started the game well but for some reason lost their concentration and now find themselves in a real dogfight to reach the next phase of the competition.
The team that is setting Group L alight is Oostende, who are riding a five-game winning streak in the EuroChallenge after their 85-73 triumph at KK Zadar.
Can Caleb Green shoot the ball from long distance for Oostende?
You bet he can.
Green, 25, hit five of 11 shots from behind the arc and has now drilled 17 of 34 (50%) on the season in Europe.
Another player that is on fire right now is Ben Woodside of BCM Gravelines Dunkerque.
The American playmaker torched BK Ventspils for 27 points and hit all eight of his free-throws.
Mouhamed Sene's stock continues to go up with Gravelines.
For the second consecutive week, Sene, a 2.11m Senegalese center, had a double-double.
Last week at Sport Lisboa e Benfica, he finished with 15 points and 13 rebounds and on Tuesday, the 24-year-old walked off the court with 15 and 10.
Other than Woodside's free-throw shooting, however, Gravelines' 57.1% effort on Tuesday will have to improve.
Gravelines were just 12 of 21 at the stripe.
Benfica, meanwhile, grinded out a home triumph over Norrköping Dolphins that has left three teams with 1-2 records in Group K.
There is no question that Turkey's team in the EuroChallenge, Pinar Karsiyaka, is for real.
Dexia Mons-Hainaut have left the country not knowing what hit them.
Pinar Karsiyaka thrashed the Belgian team, 94-
The home side forced Dexia to turn the ball over 23 times.
Karsiyaka also out-rebounded Arik Shivek's side, 34-22.
The team Dexia (1-2) now trail by a game is KRKA Novo Mesto (2-1), who bounced back from their loss at Karsiyaka and routed Antwerp, 62-46.
Spartak hit back from their weekend loss at BC Triumph in Russia by thrashing Maccabi Haifa, 101-60.
After leading 44-33 at the break, Spartak scored 30 third-quarter points and blew the visitors away.
Lukoil drove another nail in the coffin of Barak Netanya (0-3), winning 84-76.
Netanya, just as they did at Spartak in the first week of the Last 16, gave Lukoil a lot of problems.
They cut a 19-point deficit to just one with 1:33 to go in the game but ran out of steam.
The brave attempt to come back was of little consolation to the Netanya players.
"I don't believe in moral victories," Netanya's Romeo Travis said.
"We waited for too long to start playing as a team and start playing hard.
"Everybody on the team should've started the way we finished and I believe it would've been a different game.”