St George Illawarra might be secure in the NRL top eight for another week but face some sleepless nights following their 19-12 win on Thursday night over Penrith.
Influential back-rower Tyson Frizell was among three Dragons players put on report in the unconvincing victory at WIN Stadium.
The Panthers were the better side for most of the game but the Dragons managed to get over the line, as Gareth Widdop and Benji Marshall came to the fore in the final quarter.
Frizell is facing a hefty suspension for tripping Will Smith. He also has 75 carryover points from a high tackle earlier in the year.
Euan Aitken (knee to head) and Jake Marketo (dangerous throw) are also expected to come under scrutiny from the match review committee.
The Dragons needed two points to stay in the eight with fast-finishing Manly nipping at their heels and it was halves Marshall and Widdop who stood up when it mattered most.
After scores were tied at 12-12 for most of second half, a deft Widdop kick allowed the Dragons to trap the Panthers in-goal and Marshall slotted a field goal the next set.
Seven minutes later, Widdop grubbered for himself and planted it to kill off any chance of a Panthers comeback.
Earlier, the home side grabbed an 8-0 lead after Peter Mata’utia exploited some poor Penrith goalline defence.
However, the Panthers wrestled back the ascendancy thanks to Jamie Soward’s kicking game as David Simmons and Josh Mansour crossed to make it 10-10 at the break.
The Panthers are expected to be without Elijah Taylor for the rest of the season after he suffered a suspected broken arm.