Northamptonshire seamer Ben Sanderson took the third five-wicket haul in his last four innings before Sussex fought back on the first day of their LV=County Championship match at Hove. The 32-year-old has 25 wickets this season – 15 of them against Sussex – after he took five for 45 in Sussex’s 175. Northamptonshire were 91 for four at stumps.