United won a penalty after Tevez had scored a brace but the team's regular penalty-taker Cristiano Ronaldo refused the Argentinian's request and grabbed the opportunity to score the 90th-minute spot kick.
My ball: Ronaldo refuses Tevez's request to take the penalty
"Carlos Tevez is making a great contribution this season," said Ferguson.
"Cristiano is our regular penalty-taker so I can understand why he wanted to take it but it would have been great for Carlos if he had scored a hat-trick."
Anger: Tevez shows his annoyance at Ronaldo's decision
Tevez scored his seventh and eighth goals for United but will have to wait a bit longer for his first United hat-trick.
Penalty strike: Cristiano Ronaldo takes, and scores the penalty against Derby
The goal was the Portuguese's 14th of the season, a remarkable achievement for a player that doesn't play as a frontline striker.
-
Duchess of Cambridge is pretty in pink at her first Buckingham Palace garden party
-
News pictures of the day
-
The Glamour Awards - stars turn on the style
-
Horror on the 5.53! Commuter dragged 200 feet after getting hand trapped on train
-
Chelsea have the League’s highest wage bill for eighth year in a row
-
Locked up and banned: The Tube drunk whose vile racist rant was caught on film (video)
-
British housewife facing FIRING SQUAD over Bali drugs smuggling charge was 'neighbour from hell' -
London 2012 Olympics: Raising the bar and the Games haven't even started yet. Price of toasting Team GB is £6 a pint! -
Timebomb ticking in Thames Estuary could put Boris Island plans in jeopardy -
Video: Intruder bursts into Leveson Inquiry to brand Tony Blair a war criminal
Family pay tribute to the London man who gave his life to save a five-year-old girl from drowning 
Eton schoolboys fly Games flag on Everest 
Shrimpy's - review 
London Fields forever: street style from the hippest park 
The O2
Check out the cool stuff happening under our tent such as the hottest gigs, comedy, sport, films, clubs, bars, restaurants and much more.
A home to be proud of with Halifax
Download the Halifax's brilliant, free new Home Finder app, and take all the pain out of finding your dream home.
Can you imagine a career in teaching?
Be inspired to teach - let real teachers show you how rewarding the job can be.
Playing a game-changing role during the Games
Cisco is providing the solutions for London 2012's complex IT needs.
Win a Silverstone track day with Zantac 75
Feel the burn of a different kind - 20 Silverstone motoring experiences to be won
Celebrate with MARTINI®
This weekend toast one royal with another and make your Jubilee sparkle with a MARTINI Royale.
Victoria Coren
Summer party
Diamond Jubilee
Glamour Awards
Garden party
First review
Fair-weather goths
Dog save the Queen
A better ex than husband
Best of the Baftas
