American No 1, moves into world's top 10 for first time in career

Sock beats Filip Krajinovic to claim Paris Masters title and book spot at ATP Finals

Sock becomes year-end American No 1, moves into world's top 10 for first time in career; Pablo Carreno Busta misses out on automatic spot at season finale in London

Jack Sock defeated Filip Krajinovic in three sets to claim the Paris Masters crown and book his spot at the season-ending ATP Finals in London.

The American, who knew he needed to win the title in the French capital to feature at the O2, proved too tough an opponent for the Serbian qualifier who had enjoyed a dream run to Sunday's final.

Sock, the world No 22, will move into the world's top 10 for the first time in his career as a consequence of his 5-7 6-4 6-1 victory and becomes the first American to feature in the season finale since Andy Roddick in 200

Krajinovic, playing in only his fifth Masters 1000 appearance, opened the match on serve in composed fashion with both players producing high-quality tennis highlighted by a well-executed drop shot from the Serbian to claim the opening game.

Sock began well behind his serve winning his opening two service games to love and forcing his opponent to work hard on serve with some brutal baseline hitting.

The first break of the match came in the sixth game of the opening set when Sock double-faulted on break point, however the world No 22 responded immediately with a break of his own after Krajinovic threw in two double faults

The American soon secured the double break to move 4-1 ahead and despite initially losing his concentration on serve in the sixth game of the set, making three unforced errors, he held his focus to take the final into a deciding set.

Sock, playing with renewed intensity, moved ahead in the decider with a pivotal break of serve courtesy of two exquisite winners down the line from both wings and took firm control of the encounter with a backhand winner to secure the double break advantage against a demoralised Krajinovic.

Sock completed the victory with a third break of the deciding set to claim his maiden Masters 1000 title and bring an end to a run of 107 consecutive European winners of Grand Slams, Masters and ATP Finals.