It's common knowledge among jiu-jitsu practitioners that judo groundwork may not be as intricate and refined but must always be feared and respected. 

Judo rules place great emphasis on standing techniques in an effort to promote thunderous throws that result in crushing landings. Judo referees only allow a brief period of time on the ground before the combatants get stood back up, so attacks must be immediate and must be fierce. 

The Tbilisi Grand Prix 2018 took place in Georgia last weekend, and there were a number of wins via ground techniques, known as "newaza" in judo terminology. 

Watch below for five example from the men's divisions, where we've highlighted four armbars and one particularly nasty choke from the back. 

And remember, treat judo fighters with respect, because if they see an arm they'll take it home with them. 

Vazha Margvelashvili (GEO) vs. Zsolt Gorjanacz (HUN)

Armbar, 2:56 

Azamat Mukanov (KAZ) vs. Schamil Dzavbatyrov (GER)

Armbar, 0:30 

Lasha Shavdatuashvili (GEO) vs. Nils Stump (SUI)

Armbar, 2:05 

Rafael Macedo (BRA) vs. Theodoros Tselidis (GRE)

Armbar, 4:55

Merab Margiev (RUS) vs. Sanan Ahmadov (AZE)

Choke, 2:35