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Two teams remain undefeated and just one is yet to enjoy a win in the 2019 Telstra Premiership. That means finding form lines has been difficult over the opening rounds.

Before you get your tips in for round four, see who the NRL.com experts are picking and read Brett Kimmorley's previews of each match.

Round 4

Roosters v Broncos, Thursday 8.05pm at SCG

Brett Kimmorley says: For the Roosters, a lot of it will depend on whether Copper Cronk is back in the team. If he is, what will that do to Luke Keary's domination of game management and getting into first pivot. James Tedesco was wonderful last week.

For the Broncos the key is to not leak so many yards when defending. Last week the Dragons were able to get so far up the field when they had the ball. Roosters by 4

Warriors v Titans, Friday 8pm NZT (6pm AEDT) at Mt Smart Stadium

Brett Kimmorley says: Both teams have been pretty poor to start the season. I want to see the Warriors forward pack be a lot tougher when the game is on the line.

The Titans are scoring tries off kicks but their attack has been very poor. Garth Brennan needs to get some second phase football going and get Mitch Rein into the game. Warriors by 2

Panthers v Wests Tigers, Friday 8.05pm, Panthers Stadium

Brett Kimmorley says: A lot of attention on Ivan Cleary. On the bus. Off the bus. Back on the bus. Both teams were bad in round three. For Penrith, it is about Nathan Cleary getting some game control.

Let's see some shape from Penrith. For the Tigers, I imagine their forwards will reply after the serving they got last week. Pride usually dictates that will happen. They also need to start scoring tries that aren't from kicks. Panthers by 2

Sea Eagles v Rabbitohs, Saturday 3pm at Lottoland

Brett Kimmorley says: Tom Trbojevic was the star for Manly last week. He gives them so much confidence. Both Manly front-rowers (Addin Fonua-Blake and Martin Taupau) can lay the foundation for the Se Eagles.

I'm loving watching Damien Cook play. Now he is linking up with players when he runs as well as just darting out of dummy half. Cook's game is going to the next level. Rabbitohs by 6

Cowboys v Raiders, Saturday 4.30pm AEST (5.30pm AEDT) at 1300Smiles Stadium

Brett Kimmorley says: The Cowboys need to find a bit of ball control. They need to win ugly and not try too much. Maybe the post-Thurston hoodoo is upon them now. For the Raiders, I think Josh Hodgson still isn't firing at the moment even though he is playing reasonable football. If the Raiders forwards can match the Cowboys I think Hodgson will have a fair say in who wins this game. Raiders by 4

Eels v Sharks, Saturday 7.35pm at ANZ Stadium

Brett Kimmorley says: Parramatta competed against the Roosters but made a few errors. The Eels pack is powerful but I think the time will be taken away from Mitchell Moses and Dylan Brown again this week.

Brown and Reed Mahoney will come up against a strong defensive team for the second week in a row. For the Sharks, the make-up of their side will determine a lot. The Sharks will probably be down a few troops. Eels by 2

Storm v Bulldogs, Sunday 4.05pm at AAMI Park

Brett Kimmorley says: The Dogs were good last week. With a few new players they showed more spark and excitement. Nick Meaney looked really good. The test for the Dogs is holding that confidence and maintain that style of play against a team like Melbourne.

They should see the Storm game as a challenge to see where they are at. For Melbourne, Cameron Munster is really growing his game. He has better control of his game and is growing his running game. Storm by 10

Knights star Kalyn Ponga.
Knights star Kalyn Ponga. ©Mark Nolan/NRL Photos

Knights v Dragons, Sunday 6.10pm, McDonald Jones Stadium

Brett Kimmorley says: The excitement of Kalyn Ponga playing fullback again is going to be great for the Knights. The game management and pressure of defending in the front line have been take off him. Hopefully we see a return of the excitement machine we saw last year.

For the Dragons, they ground out an enormous win last week. Gareth Widdop will be missing for a long time, but Corey Norman gets the opportunity to play that five-eighth role and Matt Dufty will add some pace from fullback. Dragons by 1