Horndean face a tricky midweek FA Vase replay at Longwell Green Sports after their second round qualifying tie ended 1-1 after extra-time at Five Heads Park.
Although the visitors were reduced to 10 men early in the second half of Saturday’s encounter, Dave Carter’s side failed to press home their advantage.
And the boss knows his team will have to be far more ruthless in the return clash tomorrow night.
‘We have failed to take our chances and when you do that you can’t expect to win games,’ said Carter.
‘Longwell only had two shots all afternoon.
‘And after they had their player sent off, they just sat behind the ball.
‘In truth, they could have had a couple more sent off.
‘We camped in their half and hit the post and crossbar.
‘Now we face a two-and-a-half-hour drive tomorrow night.
‘And I have to put a team together from players who can get off work early.
‘I am confident, though, we can still go through into the next round.’
The visitors stunned Horndean after nine minutes by taking the lead with a well-struck 25-yard free-kick.
Nathan Paxton grabbed the all-important equaliser on 65 minutes when he cut in from the left, beat two defenders and fired into the bottom right-hand corner of the Longwell net.
United Services are eyeing an FA Vase shock when they host Sholing Sports in their second round qualifying replay at Burnaby Road tonight (7.45pm).
The Sailors held the Wessex League premier division outfit to a 1-1 draw after extra-time in their first meeting on Friday night.
Bob Brady’s men took a 20th-minute lead when Jamie Cuthbert rose to head in a Pete Lines corner.
Sholing equalised in contentious circumstances in the second half.
Services claim the ball went over the byline before it was crossed for Sholing’s Dan Miller to head home at the far post.
‘It was disappointing because their player scooped the ball back when it was a yard and a half over the line,’ said United Services manager Brady.
‘All three officials were too far back and missed it.
‘We did well and had enough chances to win it.
‘If we can repeat our levels from Friday then we will give ourselves every chance but we know it is still going to be tough.’
The home side are without Mark Robinson for the replay because of work commitments but hope to have Callum Coker back.