BASSETERRE, St Kitts (CMC) — Former winners Jamaica were upset by one of two United States of America teams in the opening round of the Rising Stars Men’s Under-19 50-over Championship, while defending champions Barbados made light work of Guyana to register a comprehensive victory here on Thursday.

Utkarsh Srivastava took four wickets to propel USA-1 to a thrilling 13-run victory over Jamaica, in the day’s biggest upset.

In other results, Barbados produced a strong batting performance to overcome Guyana; the Windward Islands edged the Leeward Islands in a low-scoring affair; and Trinidad and Tobago had a slender, one-wicket win over USA-2.

At St Mary’s Park, Saharsh Shwethan scored an impressive half-century and Srivastava made crucial breakthroughs as USA-1 stunned Jamaica.

Shwethan scored 85 off 97 deliveries with 12 fours to be the backbone of USA-1’s total of 209 in 47.4 overs, after they won the toss and elected to bat.

He received solid support from Sahil Garg, who made 36, and Adnit Jhamb who contributed 35.

Tamarie Redwood (4-41) and Vitel Lawes (3-23) had helped reduce USA-1 to 109 for eight at one stage but Shwethan first added 50 with Sahir Bhatia, who scored 14 crucial runs, and then dominated a 50-run partnership with last man Arya Garg who finished unbeaten on six.

Jamaica then got a superb start to their run chase, with openers Tyriek Bryan and Kev’Aundre Virgo both scoring half-centuries during a 117-run partnership.

But once Sabrish Prasad struck to get rid of Bryan for the top score of 58 off 48 balls, Jamaica’s top and middle order crumbled.

Srivastava accounted for Virgo’s wicket for 51, two runs later, as Jamaica lost seven wickets for 51 runs to slump to 170 for eight.

Deshawn James and Roshawn McKenzie tried their best in a 25-run partnership but they ultimately fell just short.

Srivastava ended with 4-31 while Sahir Bhatia took 2-24 for the USA-1.

At Elquemedo Willett Park, Barbados produced a strong showing with both bat and ball in a dominant 140-run win over Guyana.

Captain Joshua Dorne made 63 off 67 balls and opener Zachary Carter struck 62 from 70 deliveries, to be the mainstay of their side’s 287 for six off their 50 overs.

Medium pacer R’Jai Gittens then grabbed four wickets to derail Guyana’s run chase early on, and they were eventually bowled out for 147 in 31.3 overs.

Gittens led the way with 4-26, with support from Xaundre Baptiste (2-22) and Dorne (2-27).

At Conaree Sports Club the Windward Islands produced a spectacular bowling effort to snatch a five-run win over the Leeward Islands.

Victory looked unlikely when they were routed for 124 in 29.5 overs after being sent in to bat.

Openers Stephan Pascal and Theo Edward both top-scored with 21 runs.

Micah MicKenzie ran through the lower order, taking 5-36, while Kunal Tilokani took 3-13.

Faced with a seemingly straightforward run chase, the Leeward Islands were cruising at 40 for one but lost their last nine wickets for 79 runs to be dismissed for 119 in 35 overs.

Kirt Murray (3-19), Kirsten Murray (3-23) and Darvin Forde (3-24) were the main architects of the batting collapse.

At St Paul’s Sports Complex, Trinidad and Tobago prevailed over USA-2 by one wicket in a thrilling contest which was decided in the last over.

Amogh Arepally and Aryan Tummala both scored half-centuries to propel USA-2 to a competitive 259 for seven at the end of their 50 overs.

Arepally made 66 and Tummala hit 51, and the USA-2 used a strong showing by their top order as Ansh Bhoje scored 38 and Darshan Haribabu 36 to help them get up to their eventual total.

Despite a knock of 75 from Brendan Boodoo USA-2 would have been favoured to win the contest after reducing T&T to 188 for eight in the 41st over.

But Cristian Rampersaud, who finished unbeaten on 49, and Aadian Racha who made 42, added 70 runs for the ninth wicket as T&T got over the line with five balls to spare.