The outstanding player sustained the leg issue while playing in Bayern Munich’s 2-0 win over Schalke on Saturday.
Kamba, now 35, and his wife who is only reported as ‘Christina von G’ due to privacy laws have been sentenced to three years and 10 months in prison after being convicted of fraud after life insurance paid out £1m due to his death.
Gross arrives in Gelsenkirchen to join a club rock bottom of the Bundesliga, without a win from their first 13 games of the season and winless in 29 in the league dating back to January 2020.
Baum was brought in to replace former Huddersfield boss David Wagner, who was sacked following their horror start to the new season.
The Bundesliga club were thrashed 8-0 by champions Bayern Munich in their opener last weekend and then suffered a 3-1 defeat by Werder Bremen on Saturday.
Former Bayern Munich great, Sepp Maier, has criticised an alleged agreement that Schalke goalkeeper, Alexander Nuebel, would join the Bundesliga champions in summer.
The 47-year-old left Huddersfield Town by mutual consent in January with the club bottom of the Premier League.
In one of the most one-sided knockout games in the competition’s history, City built on their 3-2 away first-leg lead
Wolf was removed on Sunday after the Matchday 20 defeat to Schalke that was Stuttgart’s sixth loss in their last seven league games and saw them drop to within three points of 16th, the relegation/promotion play-off place.
The semi-final first legs will played on May 4, with the second legs held a week later on May 11
The Red Devils will face a team which currently sits eighth in Ligue 1 and have won less than half of their 17 domestic fixtures
Ronaldo came within inches of his hat-trick and equalling Lionel Messi’s record of 14 Champions League goals in a season again seven minutes from time, but he had to settle for just a double on the night as his low left-footed effort came back off the post and rebounded to safety
Forward Andre Schurrle also returned from injury, but it was Torres who only took five minutes to make his mark, stooping low at the back post to head home after evading his marker
The European governing body said its disciplinary panel would investigate the matter but had not yet set a date