Per Chelsea's official Twitter feed, the Dutchman said the Spain international could be rested against the Canaries or Stoke City on Saturday with PSG looming in the second leg of their UEFA Champions League round-of-16 tie on March 9:
Guus says Diego Costa could be rested in one of our next two games. #CFC— Chelsea FC (@ChelseaFC) February 29, 2016
Which game should Costa be rested for?
Though the Stoke clash would be the logical choice of the two in which to rest a key player given it allows more recovery time, the Blues may have need of Costa's physical presence when they host the Potters.
Whenever he's rested, in his place could come January signing Alexandre Pato, who is yet to feature for Chelsea since arriving on loan.
Hiddink said the Brazilian could make his debut on Tuesday but admitted the forward is facing competition from youngsters such as Bertrand Traore for a place in the side, per the club's Twitter feed and ESPN FC's Chelsea correspondent Liam Twomey:
Guus says Pato is not ready for 90 minutes but he is ready to play part of the game. #CFC— Chelsea FC (@ChelseaFC) February 29, 2016
Hiddink admits Traore is ahead of Pato in the pecking order now: "I like fair competition with the youngsters" #cfc— Liam Twomey (@liam_twomey) February 29, 2016
With captain John Terry sidelined after suffering a hamstring injury, Branislav Ivanovic has enjoyed a run of games at centre-back alongside Gary Cahill. The 69-year-old praised their partnership and singled out the Serb's aerial prowess in the wake of his late headed winner against Southampton:
Guus says he is very pleased with the Cahill-Ivanovic combination at the centre of our defence. #CFC— Chelsea FC (@ChelseaFC) February 29, 2016
Guus says Ivanovic is one of the best players in the league at heading a football. #CFC— Chelsea FC (@ChelseaFC) February 29, 2016
Indeed, with his size and strength, Ivanovic is well-suited to playing as a central defender as well as at his usual position of right-back, but with Cahill and Terry also enjoying a fruitful partnership, he's rarely had the opportunity to feature there.
Hiddink also gave the latest on Terry as the stalwart continues his road to recovery:
Hiddink on Terry: "He is on the pitch with some running. We'll see how he reacts to the training after this week" #cfc— Liam Twomey (@liam_twomey) February 29, 2016
Hiddink on Terry recovery: "I'm cautious because these kind of injuries have a danger of a setback, regardless of age [of the player] #cfc— Liam Twomey (@liam_twomey) February 29, 2016
Pedro isn't set to feature at Carrow Road, either:
Hiddink on Pedro: "I will see him now. He was in for treatment yesterday." Says he's not sure injury will be resolved "in a few days" #cfc— Liam Twomey (@liam_twomey) February 29, 2016
The Dutchman reiterated the club are still hoping to improve on their disappointing position of 11th in the Premier League table and praised his players' attitude as they work toward their goal:
Guus says it will be difficult to climb the table but the aim is still to get Chelsea back to where we belong. #CFC— Chelsea FC (@ChelseaFC) February 29, 2016
Hiddink says he's happy with players' attitude despite little to play for in PL. "We've had setbacks in games but they are resilient" #cfc— Liam Twomey (@liam_twomey) February 29, 2016
While the Blues are still not yet at their best, they've improved markedly under Hiddink's care since he took over in December, and the 2-1 defeat away to PSG in the Champions League is their only loss under him in all competitions in that time.
Against a Norwich side that have lost six of their last seven league games, Chelsea can take another step on the road to recovery with a win on Tuesday.