VALENCIA — Carlos Alcaraz starred in singles and doubles as Spain made a winning start in the Davis Cup Finals Group Stage against an injury-blighted Czechia. Roberto Bautista Agut secured the first point for Spain in singles with a 6-2 6-3 win over Jiri Lehecka. It set Alcaraz up to secure the win, but Czechia’s Tomas Machac gifted the home team the decisive second point when he was forced to retire in the third set. It was all the more disappointing for Machac that he picked up the injury after winning a first-set tiebreak against Alcaraz. The world No.3 was far from his best in the opening stages, spewing 21 unforced errors in the opening set, in his first Davis Cup appearance since 2022. Machac was unable to capitalise on that lead. On serve at 2-1 in the second set, Alcaraz played one of the most absurd points of the season: combining last-ditch defending on the baseline, before charging to retrieve a short ball and then catching Machac’s passing shot with a full-stretch backhand volley. He held a finger to his ear as the Valencia crowd went berserk, but on the other side of the net Machac was clutching his...