BDO World Championships: Robbie Green ready for Sajwani

Robbie Green says he will have to improve his level of performance if he is to beat Lakeside giant-killer Peter Sajwani at the BDO World Championships.

Green, 40, will face Swedish supermarket manager Sajwani in the last 16 after beating Lithuania's Darius Labanauskas 3-1 on Tuesday.

Qualifier Sajwani eliminated top seed James Wilson in round one.

"For him to come back after what James did shows he's got grit - he's going to be a tough player," he told BBC Sport.

"Obviously I'm going to have to improve on my match against Labanauskas but that's the way you get into the tournament.

"I can play a lot better than that but I'll take it."

Wallasey-based Green has been struggling with a knee injury in recent months and is managing the problem as he looks to better his run to last year's semi-finals.

"I have to work out what practice I do," added the 16th seed.

"I did a good session the other night with [fellow BDO player] Paul Hogan and I was supposed to have another session with him on Monday, but I couldn't do it. I got up in the morning and it was really tight.

"I didn't want to overdo it, so I did 10 minutes here and 10 minutes there, just to try to loosen it up a bit.

"It's been fine today. I wouldn't put the performance on my knee, it just wasn't spectacular."