We had very tough set of years before the last year of success. (fortune.com)
This will be a very tough set of 3 (if we qualify) fixtures for Arsenal. (justarsenal.com)
All the same, Tough sets out the evidence convincingly as he describes how under - parenting leaves children doomed to fail; without the confidence to recognise opportunity or the self esteem to seize it, they are destined for mediocrity. (telegraph.co.uk)