Manchester City can "definitely" win a historic quadruple this season, says midfielder Phil Foden.
Foden scored twice as City beat Newport to reach the FA Cup quarter-finals.
Pep Guardiola's side are top of the Premier League, play Schalke in the Champions League last 16 on Wednesday and meet Chelsea in the Carabao Cup final next Sunday.
"Everything is going well at the moment," said 18-year-old Foden. "But it is it is going to be difficult."
No English team has won all four major competitions in one season, with Manchester United coming closest by claiming the Premier League, FA Cup and Champions League in 1999.
"It's a big squad and everyone wants to show the boss they can start," England Under-21 international Foden told BBC Sport.
"He rotates the squad a lot and he gives people a chance."
After Saturday's FA Cup tie at League Two side Newport, Guardiola played down talk of a clean sweep of trophies, pointing to Manchester United's Champions League defeat by Paris St-Germain - which ended interim boss Ole Gunnar Solskjaer's unbeaten start as manager at Old Trafford - as evidence that winning runs can come to an abrupt halt.
"We will see in May and June how we do but it is important to be there in all competitions in February," the Spaniard told BBC Sport.
"Now we have to recover and prepare for our trip to Germany [to face Schalke]."
Speaking to BT Sport, he added: "We are in four competitions - every game is completely different.
"You play League Two, then Champions League. You have to adapt and change mentality.
"The big mistake is believing you are better than anyone.
"It is a mistake, like United are praised and better than PSG - but you saw what happened. You have to be calm and prepare well."
I understand English football better than ever now - Guardiola
It took City until the 51st minute to score against a stubborn Newport in a raucous atmosphere at Rodney Parade.
The difficult pitch also caused problems for the Premier League side but Leroy Sane opened the scoring before Foden's two goals and a fourth from Riyad Mahrez.
"The home crowd was amazing," said Guardiola, who is yet to win the FA Cup.
"I understand English football today better than ever and how tough the cup is in these conditions.
"They used their points where they are better than us, that is why I am so delighted with how we have played."