Thistle host quarter-final first leg
Thistle finished fourth, Queen's Park third in Championship
Turner gives Thistle lead against run of play
McMillan adds Thistle's second
Thomas pulls one back for Spiders, but Fitzpatrick restores advantage
Boateng's deflected shot and Thomas' drive draw visitors level
Graham snatches late winner for Thistle
Sides meet again in Friday's return leg
Championship play-offs: Airdrieonians 6-2 Falkirk, Alloa Athletic 1-0 Hamilton Academical
League 1 play-offs: Annan Athletic 6-0 Dumbarton, East Fife 0-1 Clyde
Partick Thistle v Queen's Park (19:45)
Thistle come into this unbeaten in six games. Kris Doolan's side are also unbeaten in five at home.
As for Queen's Park, they've won just once in their last seven outings and are four without win on the road.
In the most recent meetings between the sides, Thistle won 4-0 at Firhill. Queen's, however, had won the previous three.
Partick Thistle v Queen's Park (19:45)
Partick Thistle manager Kris Doolan tells BBC Scotland: "We're disappointed we didn't finish second, but the play-offs give you so much to play for. We're delighted to be here.
"We've almost got a full squad available, so that continuity with our starting line-up is huge.
"We know it'll be a tough game. They'll be hurting. But we're at home and we have to take advantage of that."
Image source, SNSIt's not just the Premiership play-offs that start tonight, by the way.
We'll be providing goal updates from the Championship and League 1 play-off semi-finals.
Championship play-offs:
League 1 play-offs:
Partick Thistle v Queen's Park (19:45)
Partick Thistle v Queen's Park (19:45)
Thistle remain unchanged after they ended the league season with a 2-2 draw away to Raith Rovers on Friday.
As for visitors Queen's Park, it's three switches from the side that started that mad 5-3 title-deciding defeat by Dundee.
Lee Kilday, Tommy Robson and Josh McPake all drop to the bench as Louis Longridge, Jake Davidson and Alex Bannon all come into the starting line-up.
Image source, SNSQueen's Park are looking to recover from Friday's loss
Partick Thistle v Queen's Park (19:45)
Partick Thistle: Mitchell, McMillan, Holt, Brownlie, Turner, Tiffoney, Bannigan, Graham, Lawless, Muirhead, Docherty.
Substitutes: Sneddon, Dowds, Smith, McKinnon, Hodson, Mullen, Fitzpatrick, Owens, MacKenzie.
Queen's Park: Ferrie, Oakley, Fox, Longridge, Thomson, Thomas, Davidson, Savoury, Bannon, Shields, Boateng.
Substitutes: McKenna, Robson, Kilday, Henderson, McPake, Moore, Healy, Jarrett, Eze.
Partick Thistle v Queen's Park (19:45)
Recovered from Friday? Nope. Didn't think so. But we're all ready to again, right?
Partick Thistle and Queen's Park kick off the Premiership play-offs tonight, just four days after one of the maddest nights... ever?
Watch it all unfold on the BBC Scotland channel from 19:30 BST. More chaos expected. Strap in.
Image source, SNSFirhill for some Tuesday sunshine