Flora Tallinn/Lincoln: Your guide to Celtic's Champions League rivals
Brendan Rodgers will travel to Estonia or Gibraltar for his first competitive game in charge.
Celtic will travel to either Estonia or Gibraltar after being drawn with the winners of Flora Tallinn v Lincoln Red Imps in the second qualifying round of the Champions League.
The Scottish Premiership champions will start their European campaign away from home on July 12/13 with the home tie the following week on July 19/20, but the order of these fixtures are subject to change.
It will be Brendan Rodgers first competitive games in charge after replacing Ronny Deila as manager of the Parkhead club at the end of the 2015/16 season.
So what sort of trip do Celtic and their supporters face? We've looked at both possible teams and venues to give you the lowdown.
Estonia's Flora Tallinn are the champions of Meistriliiga. They are a relatively new club, who were founded just 26 years ago in an attempt to revive Estonian football.
They also play in green and white so expect to see them in their black and white away kit if they come to Glasgow next month.
They won their league last season by eight points but are currently fourth in the table this season, nine points from the top after 17 games.
Meanwhile, Lincoln Red Imps are winners of the Gibraltar Premier Division. They look a bit more like AC Milan than Celtic though in terms of their kit, playing in red and black stripes.
They were also comfortable winners of their respective league, finishing 11 points clear at the top, losing just one game all season.
For Flora it was in 2006-07 when they reached the second round of the UEFA Cup qualifiers, beating Lyn Oslo on the way. They were then knocked out by Brondby.
Lincoln's first European adventure came in 2014/15 but they fell at the first hurdle. They went one step further last season, beating Andorra's Santa Coloma but lost to FC Midtjylland in the second round.
Unless you're clued up on your Estonian football the chances are you won't recognise many in the Flora line up. One name may jump out though - Hannes Anier - he's the younger brother of former Motherwell, Dundee United and Hibs striker Henri.
Lincoln have a wider mix of nationalities in the squad with several Spaniards, some Argentinians and Portuguese nationals joining the Gibraltarians.
Striker (and policeman) Lee Casciaro scored Gibraltar's first competitive goal against Scotland in March 2015. He's also known as the 'King of Gibraltar' - not solely for that reason though. You might also know Liam Walker from his Portsmouth days.
Flora play at A. Le Coq Arena, which is also the home of the Estonia national team. Wayne Rooney's free-kick gave England victory in October 2014 as Roy Hodgson's team made their way to Euro 2016.
It's south east of Tallinn city centre and the old town and holds 10,000 supporters.
But if you think tickets for Celtic's game there will be few and far between there will be even less if Lincoln get through. They play at Victoria Stadium which holds just 5,000 supporters.
It sits north of the Rock, and less than 900m south of both the border to Spain and Gibraltar's airport.
There are no direct flights from Scotland to Tallinn and even if you want to take a connecting flight be prepared to splash the cash.
If the away leg goes ahead on July 12/13 you can fly from London Stansted to Tallinn on the Monday morning and back using the same route on the Thursday for £176.
Prices are lower to get to Gibraltar but again there are no direct flights from Scotland. You can fly on those same dates from London Gatwick for £128.
Here's a tip though, if you like adventures and elaborate detours, there are cheap flights to Tallinn via Lithuania and Norway.
No such luck with Gibraltar but you can get a bus from the likes of London, Paris and Barcelona to the border and walk into the country.
Tallinn is a city with a mix of old and new parts. The old town is compact and the place to be if you want cheap bars, while the rest of the city is more modern and resembles many other western cities.
If you've got time, you can also take a day trip by boat to Helsinki. But if you're going for nightlife, bear in mind that people travel from Finland to Estonia on booze cruises, and not the other way around.
Meanwhile, at three and a half miles in length and one and a half wide you really can see the whole of Gibraltar if you want.
Take a hike (or drive) up the Rock and meet some of the local wild monkeys, check out St Michael's Cave or explore the Great Siege Tunnels. Or hit the usual British shops if you want to feel home from home.
If you're in Tallinn and looking for some lucky omen ahead of the game then go in search of a chimney sweep. They still wear the 19th century uniforms and it's supposedly good luck to touch their brass buttons.
Meanwhile, in Gibraltar, the country's entire population could fit into Celtic Park...twice.