United are now clear at the top of the table.
"It is a good achievement," Giggs said of the recent run of results. "The form has been really good. That is another reason why we were so frustrated with the Fulham game.
"It has taken a massive effort. We knew that City were there to be caught but we had some tough games. We got through them and now we can see the finishing line, hopefully we can finish the job off."