Manchester United striker Wayne Rooney has lauded the Premier League Champions squad depth following the 4-0 win over Arsenal.
Sir Alex Ferguson's troops kept their FA Cup dream alive by eliminating their titles rivals from the prestigious cup competition.
The Red Devils next face Lyon in the Champions League on Wednesday followed by a Premier League clash with Newcastle three days later.
The 22-year-old feels United's strength-in-depth could hold the key in the gruelling run-in.
Fergie boasts marvelous options in midfield and can select his side from the likes of Cristiano Ronaldo, Ryan Giggs, Paul Scholes, Michael Carrick, Owen Hargreaves, Nani, Anderson, Ji-Sung Park and Darren Fletcher.
Scotland star Fletcher marked his first start of the year with a brace while Rooney and Nani were also on target.
Rooney said: "Last season we had to play all the players in every game.
"But this season you see Scholesy getting a rest - and at the end of the season that (resting players) could be very crucial.
"Arsenal could not cope with us as we were making runs all over the pitch. We got our tactics spot on."
The England forward admits he would love to be paired with Chelsea when the quarter-final draw is made on Monday and gain revenge for last season's defeat in the final.
He said: "The FA Cup is very important to me. It's something I've watched from really young age.
"Now I'm playing in it and hopefully we can carry on and lift the trophy."
Rooney praised Fletcher's contribution. "He was brilliant. I said to him before the game to make sure he did well and he certainly did that.
"Credit to him, he's kept himself fit and kept himself going and he was great against Arsenal."