Matt Doherty celebrates scoringImage source, Getty Images
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Doherty netted his third international goal in the Republic of Ireland's victory in Plovdiv

The Republic of Ireland came from behind to beat Bulgaria in the first leg of their Nations League promotion/relegation play-off at the Hristo Botev Stadium.

They had a terrible start in Plovdiv as they fell behind to Marin Petkov's sixth-minute goal.

Heimir Hallgrimsson's side rallied, though, and levelled on 21 minutes through Finn Azaz's close-range finish for his first international goal, before Matt Doherty headed them into a 42nd-minute lead.

The Republic saw out the stop-start second half to take a narrow lead into Sunday's second leg in Dublin.

Republic recover to take crucial advantage

Finn Azaz heads homeImage source, Getty Images
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Azaz headed home his first international goal to level for the Republic of Ireland

The Republic enjoyed a bright start in what was an action-packed first half, as Ryan Manning went close, heading straight at Dimitar Mitov after meeting Azaz's inviting cross.

The hosts then opened the scoring with their first foray forward. Lukas Petkov was afforded too much time and space to pick out Filip Krastev and he neatly backheeled the ball to Petkov, whose low first-time strike from the edge of the area went in off the post.

Manning went close again with another header at the other end, before the visitors equalised with a well-worked move.

Robbie Brady's deep delivery from the left fell to Troy Parrott at the back post and he cushioned the ball into Azaz, who had a simple headed finish.

They were inches away from taking the lead on 34 minutes as Mikey Johnston took a quick free-kick to slip in Parrott on the right-hand side of the box and he drilled the ball across the face of goal, just evading the slide of captain Nathan Collins.

The Republic did take a half-time lead as Josh Cullen clipped the ball forward to Doherty, who darted inside and bravely beat Mitov to head into the empty net.

The second half was a much scrappier affair, with neither side able to fashion clear-cut chances on a pitch that cut up greatly.

Watford teenager Rocco Vata came on for his international debut in one of five second-half changes that added little going forward, but the Republic saw the game out, with a crucial second leg to follow at the Aviva Stadium.