After their 5-0 thrashing by Manchester City, Hangeland has not lost appetite for the battle.
The Norwegian defender said: "Obviously you are low when you get beat 5-0. It was a difficult game for us.
"But what can you do? You have to pick yourselves up. There is no point dwelling on any game of football, and definitely not a defeat like this.
"We are going back to London to work on training and prepare for Sunday."
Asked if the squad believed they could stay up, the 32-year-old said: "Very much so. We have quite a few games we know we can win. It is still doable and there is a belief we can do it.
"Time is running out a little bit and we need to pick up results."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!