Glasgow's Graeme Dott overcame a scrappy battle with Essex left-hander Mark King to progress to the second round.

King, the world number 22, has twice reached the last 16 at The Crucible.

But the 30-year-old qualifier missed a pink into the middle pocked in a tense-final-frame decider, and Dott took that as his queue for victory.

Mistakes from both players made sure the encounter went the distance, but Dott held his nerve to progress in a match he described as "one of the worst I've ever played in."

Dott only managed to compile two half-century breaks - 54 and 56 - but it proved enough to take him through.

"It was a dreadful match," said Dott. "I honestly never thought I was going to win, apart from the last frame.

"We were both talking about how bad it was through the match.

"Every time he missed, the more I missed. It wasn't through a lack of effort, but maybe we were both trying too hard."

King led throughout thanks to three notable breaks - 63,64 and 65 respectively.

But Dott refused to lie down and avenged the defeat he suffered at the hands of Kind in the City West Irish Masters earlier this season.

"It's a massive result for me," added Dott, who now meets fellow Scot John Higgins in the second round.

"Every game at the Crucible is big, so I'm really, really pleased to have won."

King was honest, if not brutally honest in his description of the match.

"It was the biggest load of rubbish in the world," said King. "To come here and play so bad is very frustrating.

"I was leading, but I don't know how. I don't think I've ever been involved in such a scrappy match.

"Graeme grinds out results and he scraps. He just scrapped more than me."