Leeds could be without skipper Lee Peltier for the derby clash with Sheffield Wednesday, leaving caretaker boss Neil Redfearn with a selection headache.
Peltier sustained an ankle injury in the closing stages of last week's home defeat to Charlton and is a major doubt, while fellow central defender Tom Lees will sit out the final game of his three-match ban.
That leaves Redfearn short of options at centre-half, with midfielder Rudy Austin expected to start alongside Jason Pearce.
Leeds will also be without midfielder Michael Brown, who starts a two-match ban after receiving his 10th booking of the season at Charlton.
Redfearn has no other new injury or suspension worries, while strikers El-Hadji Diouf and Dominic Poleon, back from his loan spell at Sheffield United, are pushing for recalls.
Leeds, five points above the relegation zone, are hoping to avoid a fifth straight defeat.
Sheffield Wednesday will be without the versatile Danny Pugh as he cannot play against his parent club.
Midfielder Pugh, on loan at Hillsborough since January, played at left-back in the midweek win at Millwall. He could be replaced in the starting line-up by Reda Johnson.
Johnson was rested in midweek as he continues to manage an ongoing foot problem, while manager Dave Jones could also recall on-loan Bolton midfielder Stuart Holden and winger Jermaine Johnson, who played for the final 30 minutes at Millwall.
Jones, who has no new injury or suspension worries, must decide whether to recall all three for the derby clash, while the likes of midfield pair Rhys McCabe and Jose Semedo and defenders Joe Mattock and Martin Taylor are all in contention.
The Owls, six points above the relegation zone, have won four of their last six matches and virtually assured themselves of npower Championship football next season with victory on Tuesday night.
Newly-crowned German champions Bayern, who lost last season's final on their own ground to Chelsea, will bid to make their second consecutive final at Wembley on May 25, with the first leg of the semi-final to be played in Munich on April 23.
The draw means there will not be a repeat of three seasons ago when Primera Division rivals Barcelona and Real Madrid met in the semi-finals, with Dortmund drawing Jose Mourinho's side.
Madrid, who are semi-finalists for a record 24th time and in the final four for the third successive season, will play the second leg of their semi-final against Dortmund at home.
They avoided a final-four clash with Barcelona, who are making a record sixth successive semi-final appearance, but instead will face the only team still unbeaten in the competition this season.
Dortmund scored twice in injury time in their quarter-final second leg tie against Malaga to progress to the last four for the first time in 15 years.
Bayern chairman Karl-Heinz Rummenigge is relishing a test against a side he holds in such high regard.
"Barcelona are the benchmark for me in Europe. They have won the Champions League more than any other team in the recent years," Rummenigge told UEFA.com. "They are the best team in Europe at the moment, with fantastic attacking potential.
"We played them in 2009 and received a real thumping. I remember that game well and I don't really like to think about it, because it was quite painful to watch. However, it's a wonderful opportunity to show that we have improved a lot since then."
Rummenigge also denied that playing the opening match at home is a disadvantage.
"I think we will see two very good games, played at the highest possible level," he said. "Furthermore, I think playing at home first is a slight advantage, contrary to the popular belief that it's a disadvantage.
"We saw that against Juventus, where people said that it might be a disadvantage. But we produced a great performance at home and that set the stage for the return leg and our progression into the semi-finals.
"I'm really excited that we will get to play the best team in Europe. I still feel Barcelona are the big favourites to win the Champions League."
Champions League semi-finals: Bayern Munich v Barcelona; B Dortmund v Real Madrid. Ties 23/24 April and April 30/May 1.
The 24-year-old, who scored three goals in 35 appearances this season, was due to be out of contract from Vale Park this summer.
"It has been a pleasure to be at Port Vale Football Club and play my part in this season's success," Burge told the club's official website.
"I've played with some great players and great lads who I wish all the best for the future. I've also had the opportunity to play in front of fantastic supporters who have got behind myself and the team all season which is a credit to the club."
"With the size of the club and the fan base, combined with the hard work everyone is putting in, the club is destined for greater things and I wish all involved the very best in achieving that."
Port Vale chairman Paul Wildes added: "We thank Ryan for his service to Port Vale.
"This has been a difficult decision for both parties and we would like to wish Ryan the very best success in the next step of his career."
