St Johnstone are one of three SPFL clubs hoping to make progress in the Europa League qualifiers this evening.
Tommy Wright's side face Luzern at McDiarmid Park, kick-off 7.45pm, having earned a 1-1 draw in Switzerland last week thanks to a goal from Steven MacLean.
Derek McInnes' Aberdeen travel to Holland to take on FC Groningen, kick-off 6.30pm, with the first leg at Pittodrie having finished 0-0.
Motherwell are in Iceland to play Stjarnan, with an 8.15pm kick-off. Stuart McCall's men were 2-0 up in the first leg at Fir Park but were pegged back for a 2-2 draw after conceding two penalties.
Aberdeen boss Derek McInnes: "It's game on and both teams will feel they can win this tie. We have practised penalties. We have a team who are fit and strong and we feel they can play 120 minutes if need be, even at this stage of the season.”
Motherwell striker John Sutton: "It was our first competitive game and hopefully that's got rid of a bit of rustiness and we can go there and get the result we need. Certainly we have a squad of players capable of getting a result and hopefully we are still in Europe come Friday morning."
St Johnstone midfielder Scott Brown: "Having Stevie May back is a massive boost. Being the home side, the onus will be on us to attack. A goalless draw will get us through but no-one will want to sit in at home, so I think we will look to get a goal."
Europa League third-qualifying round draw
Real Sociedad v Aberdeen (0) or FC Groningen (0)
FC Luzern (1) or St Johnstone (1) v FC Zestafoni (0) or Spartak Trnava (0)
Motherwell (2) or Stjarnan (2) v JK Nomme Kalju (1) or Lech Poznan (0)
Ties to be played July 31 & August 7