Rory Best: Ulster captain a doubt for European play-off against Ospreys
|Guinness Pro14 play-off|
|Venue: Kingspan Stadium, Belfast Date: Sunday, 20 May Kick-off: 15:05 BST|
|Coverage: Watch live on BBC Two NI and the BBC Sport website|
Ulster captain Rory Best is an injury doubt for his side's Pro14 play-off against Ospreys at Kingspan Stadium.
The hooker injured a hamstring in training on Tuesday and has been sent for further scans to assess the damage.
Head coach Jono Gibbes has also confirmed that Iain Henderson will miss the game on Sunday with a knee problem.
Henderson is making good progress from the injury he suffered against Munster and remains hopeful of being available for Ireland's summer tour to Australia.
The winner of the play-off will secure the seventh and final qualifying place for next season's European Champions Cup.
The play-off is a repeat of the meeting between the two sides in Belfast on 13 April, which Ulster won 8-0 to end a five-match unbeaten run by Ospreys.
Best, 35, played just 10 games for Ulster this season because of a combination of injuries and international commitments but he featured in all four matches of the province's unbeaten finish to the regular season.
Ulster finished fourth in Conference B while Ospreys came fifth in Conference A but the Welsh side qualified for the play-off as third-placed Cheetahs are not eligible for the 2018/19 Champions Cup because they are a South African side.