Stoke striker Crouch played under Redknapp at Southampton, Portsmouth and Tottenham but the QPR boss feels the Potters are unlikely to part with the 31-year-old frontman.
Defender Samba, meanwhile, joined Anzhi Makhachkala in February in a £12million deal from Blackburn and Rangers could struggle to match his wages at the big-spending Russian side.
"These are two players whose names have been mentioned but at the moment we're not close to doing anything," Redknapp told BBC Sport.
"Crouch's name came up in a meeting with the chairman but I don't think Stoke want to sell him.
"We will have to wait and see, if they decide to sell him we would be interested because I like Peter, I have managed him several times."
"On Samba, again the chairman is dealing with this. At this stage I don't think that's a goer. I like Christopher Samba and he is a very good player but at this stage I don't see him leaving Russia.
"Things can changes but at this stage we're not close to doing anything."
"We are struggling a bit, we lose Ryan Nelsen now and I haven't got a replacement," he said.
Redknapp claimed his side's goalless draw against Manchester City comes as a bonus point as the reigning Barclays Premier League champions failed to move to within two points of leaders Manchester United.
Rangers remain bottom of the table despite taking points from Chelsea, Tottenham and now Man City in recent weeks and Redknapp's hard-work ethos appears to be keeping the west London club in the survival picture.
Pablo Zabaleta hit the bar for City as they toiled at a wet and windy Loftus Road whilst QPR goalkeeper Julio Cesar made a handful of excellent saves to keep the scores level.
Adel Taarabt and Loic Remy had mere glimpses of the City goal throughout the game but Redknapp was pleased to secure a much-needed point.
"Of course it is a bonus point, it is a great point," he said.
"They rip teams to pieces home and away, you would take a point off them at any time. It is a fantastic result.
"I wouldn't say it is the end (of the title race) - it is a good result for Fergie (Sir Alex Ferguson) tonight [Tuesday] for sure, but it is still open."