Ken Doherty's hopes of playing in this year's World Championships are over after he suffered a 6-4 qualifier defeat to Lee Walker in the first round.

It was a collapse for Doherty who had led 4-1 at one stage but lost five consecutive frames to bow out of the qualifiers. 

Doherty's agony was prolonged as the match was forced to a late session due to the length of the encounter.

The Irishman appeared to be well on his way to the second round after establishing a 4-1 lead over the Englishman in the best-of-11 encounter but he surrendered the next four frames in a match which started at 9.30am.

After 2pm, officials opted to suspend the game to allow the afternoon session to start due to four more matches needing to take place.

When play resumed in the evening, Walker was able to wrap up the final frame he needed for victory, taking it 70-50. 

Meanwhile, Rebecca Kenna's hopes of reaching the Crucible were ended by Brandon Sargeant.

One of only two women to be granted a place in qualifying, 32-year-old Kenna gave Sargeant a scare before suffering a narrow 6-4 loss in Sheffield.

Women’s world number four Kenna took the first frame after she kept her cool to pot the black in a nervy opener.

When Sargeant hit back to level in the next frame, it was a sign of things to come in a tense, back and forth match.

The pair continued to trade blows with Kenna, who saw Reanne Evans exit the competition on Monday, holding the highest score of 68 until eventually a half-century break occurred.

It went to Sargeant and he fell 12 short of a century break but was able to ensure it was all square after six frames.

Kenna edged 4-3 ahead, but Sargeant hit back to reel off three frames in a row and set up a tie with Andrew Higginson.