David Healy's side trail 3-1 after last week's first leg
Uefa Conference League play-off second leg: Linfield v Shelbourne
Venue: Windsor Park, Belfast Date: Thursday, 28 August Kick-off: 19:45 BST
Coverage: Watch live on BBC iPlayer, BBC Sport website and app
Linfield boss David Healy has urged fans to support the club in a "positive way" in the second leg of their Uefa Conference League play-off tie against Shelbourne.
The Blues, who are aiming to reach the league or group phase of a European competition for the first time, trail 3-1 after last week's chaotic first leg in Tolka Park.
Ahead of Thursday's game at Windsor Park, which will be live on BBC iPlayer and BBC Sport website, Linfield released a statement asking fans to avoid partaking in actions which would "further damage the name and reputation" of the club and "bring further damaging financial sanctions".
The Belfast club were fined €10,000 (£8,727) for the "racist and/or discriminatory behaviour of its supporters" and €2,000 (£1,745) for the lighting of fireworks in Windsor Park during their Champions League qualifier against Shelbourne last month.
The Irish Premiership champions were also handed a partial stadium ban, which is suspended for two years.
"The fans have a huge role, the club put out a statement to encourage supporters to give their support in a positive way, don't let the club down," Healy told BBC Sport NI.
"We have an unbelievable fanbase especially here on a European night, so we are asking them to come get behind the team and create the atmosphere."
Scoring first crucial - Healy
Evan Caffrey scored a late third for Shelbourne last week after Kieran Offord missed the chance to level for Linfield as his penalty was saved
The game in Belfast will be the fourth meeting of the sides this season and Healy believes Linfield are primed to finally beat Shels if they can make a fast start.
"Getting the first goal is paramount and if we do, who knows what can happen after that," he added.
"You've always got a chance; subs could come on and be the heroes, who knows? It is important we don't put ourselves out of the tie and that will be the message."
Healy hopes Linfield can show the ruthlessness they have so far lacked in their three previous meetings with the League of Ireland champions.
"When you get to this stage, we all feel it is an opportunity, albeit it is a tough ask, but we are capable of coming out the other end of with a positive result. A positive performance gives you the opportunity to do it.
"Fine margins cost us last week, the way the game went and being down to 10 men 17 minutes in didn't help.
"Great credit to the players, they showed resolve. We had chances, we missed the penalty, and you felt we were capable of potentially scoring, so with 11 [players on Thursday] night, a great crowd and with the chances we create, we are hopefully more clinical."
