Borthwick, Arnel star as Wellington go top
File photo – Returning to action after recovering from a foot injury, Tim Southee sent down 23 overs across two innings for Northern Districts © Getty Images Michael Bates‘ 5 for 48 followed by Colin de Grandhomme‘s unbeaten 106 in the second innings shaped Auckland‘s comfortable five-wicket win over Canterbury in Christchurch. After conceding a 15-run lead in the first innings, Donovan Grobbelaar removed Canterbury’s openers early, after which Bates…