Smith, who was playing in his first final since the Austrian Darts Open last June, put in a solid display in the final as he claimed the £25,000 title to follow up his trio of previous wins in 2014 and 2015.
The 26-year-old averaged 96.33 and hit 50% of his attempts at double to overcome battling Austrian ace Suljovic at the Victoria Stadium.
Smith raced into a 3-0 lead, including a 108 checkout, to take immediate control of the match.
Suljovic then produced a spirited fightback to break the throw of Smith twice and level the match, before holding throw to move in to a 4-3 lead.
The Englishman then took out 81 on double 12 to level the contest, and it was the ninth leg that would prove to be decisive.
With Suljovic sat on 56 to hold throw and move within a leg of the title, the 26-year-old produced a breathtaking 132 finish on the bullseye to break the throw and edge 5-4 up.
A miss at tops for the title in leg ten from Smith allowed the Austrian a dart at double 15 on a 110 finish to take the encounter to a decider.
Suljovic’s effort, though, was just inside the wire, allowing Smith to step in and seal the victory on double ten and secure the £25,000 top prize.
“It’s a great feeling – I’m so chuffed,” said Smith. “I’d forgotten what it felt like to win a tournament and it feels like I’ve just won my very first tournament again.
“This year I’ve made two finals and I thought I was going to blow it again. The 132 to go 5-4 up won me the game, it was absolutely huge. I didn’t fancy the game going five-all because Mensur is amazing ”
Smith had to work hard to book his place in the final, requiring 11th leg deciders in each of his previous four matches in the tournament, starting with Saturday’s narrow defeat of Christian Kist.
Sunday’s challenge began with a hard-fought win over Dimitri Van den Bergh, with Smith hitting a key 180 in the deciding leg as a 14-darter sealed his quarter-final spot.
In-form Rob Cross waited in the last eight where once again Smith required a last-leg maximum to give him the chance to take out 81 for a spot in the semi-finals.
In-form world number three Peter Wright, a winner of three of the four European Tour events held so far in 2017, was Smith’s semi-final opponent.
Yet again Smith needed a deciding leg, and as with the previous two matches the world number 11 hit a 180 to put himself in control of the final leg before eventually going on to pin double ten for the win.
Suljovic’s began Sunday with a 6-3 win over Cristo Reyes to claim a quarter-final spot, finishing six doubles from 11 attempts as mid-range checkouts of 76, 61, 86 and 64 helped seal his victory.
A scrappy 6-3 win over Sweden’s Magnus Caris – appearing in his first European Tour quarter-final – followed, as the number two seed moved in to the semi-finals to face Daryl Gurney.
In a tight battle, The Northern Irishman missed four match darts in the deciding leg before Suljovic eventually hit tops to claim a spot in the final.
Wright fell at the semi-final stage in his bid to claim a fourth European Tour title of the year, and he now sets his sights on the Betway Premier League Play-Offs at The O2 in London on Thursday.
Gurney’s run to the last four was his best finish on the European Tour so far this year, as he saw off Simon Whitlock and James Wilson on Sunday before losing out to Suljovic.
Cross reached his third European Tour quarter-final of the year as he continues his impressive start to live on the professional circuit, while Johnson and Caris were appearing in the last eight for the first time on the European Tour after battling through from Friday’s first round.
2017 Gibraltar Darts Trophy
Sunday May 14
Peter Wright 6-0 Stephen Bunting
Darren Johnson 6-3 Alan Norris
Michael Smith 6-5 Dimitri Van den Bergh
Rob Cross 6-2 Dave Chisnall
Mensur Suljovic 6-3 Cristo Reyes
Magnus Caris 6-2 Benito van de Pas
James Wilson 6-3 Ian White
Daryl Gurney 6-4 Simon Whitlock
Peter Wright 6-5 Darren Johnson
Michael Smith 6-5 Rob Cross
Mensur Suljovic 6-3 Magnus Caris
Daryl Gurney 6-3 James Wilson
Michael Smith 6-5 Peter Wright
Mensur Suljovic 6-5 Daryl Gurney
Michael Smith 6-4 Mensur Suljovic
A highlights programme from the Gibraltar Darts Trophy will be aired on Sky Sports on the following dates:
May 30 (7pm) – Sky Sports 1
May 30 (11pm) – Sky Sports 1
May 31 (12pm) – Sky Sports 1
May 31 (3pm) – Sky Sports 1
May 31 (8pm) – Sky Sports 1
June 1 (12pm) – Sky Sports 1
June 1 (3pm) – Sky Sports 1
June 1 (6pm) – Sky Sports 1
Third Round Round-Up
Peter Wright picked up a third European Tour win over Stephen Bunting of 2017 with a clinical 6-0 whitewash as they opened the third round in Gibraltar.
After edging a scrappy opening leg, Wright fired in legs of 12 and 14 darts and took out 117 for a 4-0 lead, before taking the next two to complete a quick-fire victory.
Darren Johnson reached his first quarter-final on the European Tour with a 6-3 win over Alan Norris.
Johnson punished a slow start from the former German Darts Championship winner to lead 4-0, with Norris pulling back to 4-3 before the Yorkshireman edged the eighth leg and then took out 156 to seal a memorable win.
Michael Smith kept alive his hopes of a fourth European Tour win with a narrow 6-5 win over Dimitri Van den Bergh in a tight battle, hitting a key 180 in the deciding leg as a 14-darter sealed his quarter-final spot.
Rob Cross won through to his third successive European Tour quarter-final by defeating Dave Chisnall 6-2 in their third round contest.
Chisnall led 2-1 early on before a 114 finish from Cross levelled before an 11-darter broke throw, and he pulled away before completing victory by securing a fifth successive leg with a stunning 153 checkout.
Number two seed Mensur Suljovic overcame Spain’s Cristo Reyes 6-3 to book his quarter-final spot, finishing six doubles from 11 attempts as mid-range checkouts of 76, 61, 86 and 64 helped seal his victory.
Magnus Caris marked his first appearance on the final day of a European Tour event by reaching his maiden quarter-final, following up his win over Jelle Klaasen with a 6-2 defeat of Benito van de Pas.
Van de Pas took out 100 to level in leg two, but saw Caris pull clear to lead 5-1, and though the youngster responded with a 76 finish, tops moved the Swedish ace into the last eight.
James Wilson produced a clinical display with six doubles from eight attempts as he produced a fine comeback to defeat Ian White 6-3 in their third round clash.
White took out 116 as he opened up a 2-0 lead, with Wilson levelling and then breaking throw with a 105 checkout as he moved 4-2 up before closing out the win.
Daryl Gurney set up a quarter-final clash with Wilson by seeing off Simon Whitlock 6-4 in a high-quality game to conclude the afternoon session’s third round.
After Gurney took out 124 and 80 to lead 2-0, Whitlock finished 146 to hit back in the third, but missed his chance to level in the fourth as the Northern Irish ace maintained a lead which he would hold through to victory.
Article courtesy DAve Allen PDC Head of Media
Images by Stephen Ignacio