Ryan Rickelton and Tristan Stubbs guided South Africa to a 139-run win in the first One-Day International against Ireland at the Sheikh Zayed Stadium in Abu Dhabi on Wednesday night.South Africa bowled Ireland out for 132, with 28.1 overs still remaining in their innings, having scored 271/9 in their 50 overs.Both Rickelton and Stubbs had to survive an early spell of pressure and tight bowling by Ireland, and cashed in at the end to score half-centuries that helped the Proteas take a 1-0 series lead with two matches still to come.Rickelton (91 off 102 balls, 7×4, 3×6) scored his maiden ODI…