Duo are accused of unsettling Rangers since arriving.
Rangers boss Steven Gerrard does not know his best team, John Hartson has told the Daily Record.
The pundit points to Rangers’ two big signings for confusing the situation.
Rangers agreed deals to sign Jermain Defoe and Steven Davis on loan deals from Bournemouth and Southampton.
Neither are yet to really hit top form and ex-Celtic aces Hartson believes the arrival of the duo has played a part in Rangers’ poor 2019.
Hartson said: “They brought in a big signing in Jermain Defoe, but it just confused the situation.
“It left Gerrard wondering who to play.
“Davis hasn’t kicked a ball.”
Neither player are guaranteed to start against Celtic at the weekend.
Rangers really should be tempted to select both, because they have experience in big games.
Hartson is running with the growing feeling that both Defoe and Davis are struggling to live up to their lofty expectations.
Big performances this weekend against Celtic will switch the narrative, with the game having the potential to re-define their spells in Scotland so far.
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