Swan Yamaha's Haga is currently in eighth position in the standings with 113 points, six behind Padgett’s Honda’s Ian Lowry, after a broken collarbone sustained in free practice left him sidelined at Cadwell Park.
But the Japanese is optimistic about his chances.
He said: “The recovery is going well and I get better every day. Still I have some pain, but of course I come back for Donington to make a good fight to get back to a top six position. I'll give my 200% to Donington.”
“The crash was a shame and I was very disappointment because I lost two races and lost my championship position and went from sixth to eighth.”
Haga has raced well in the past on the Leicestershire circuit, picking up a podium finish and WSB race wins and he continued: “I like the track and I have good memory that I have won WSB races there. I will put everything on my full experience and try very hard.”