From Longman Dictionary of Contemporary Englishunbeatenun‧beat‧en /ˌʌnˈbiːtn◂/ adjective a team, player etc that is unbeaten has not been defeated
Examples from the Corpus
unbeaten• Norton's David Kennedy hit an unbeaten 105 including six sixes and eight fours at Darlington.• Surrey declared their second innings on 310-6 with Bicknell hitting an unbeaten 53 after brother Darren had earlier scored 87.• He comes in as a replacement for unbeaten fellow Liverpudlian Shea Neary, who is out with a hand injury.• Based on the schedules and conference setups, as many as seven teams could be unbeaten going into the bowl games.• Springfield, relegated from the Premier last season, edged past previously unbeaten Great Burstead by 15 runs.• It ended a winning streak of 16 Tests and an unbeaten sequence of 18.• Wednesday bid to maintain their unbeaten start to the Premier League.• Gloucester still the only unbeaten team. 