Pro14: Wiehahn Herbst set to miss rest of Ulster season

Wiehahn Herbst joined Ulster in 2014 after five season with Natal Sharks

Ulster have received a blow ahead of Friday's game against Ospreys with Wiehahn Herbst likely to miss the rest of the campaign with a knee injury.

The 29-year-old South African prop, who has made 73 appearances for Ulster, may have to undergo surgery on the injury.

Ulster revived their play-off hopes with an impressive victory over Edinburgh last week.

They sit eight points behind Edinburgh in the race for third place in Conference B.

However, Ulster have a game in hand on the Scots as they go into their final three matches.

Home fixtures against Ospreys and Glasgow are followed by a Thomond Park encounter against Munster on 28 April.

The play-off quarter-finals take place the following weekend with the decider at the Aviva Stadium on 26 May.

Ospreys lie fifth in Conference A and they will arrive at Kingspan Stadium with confidence after winning their last four Pro14 games.