Conversation so far:
Did Henrik Larsson play for Barcelona?
At the end of the 2003–04 season, Larsson left Celtic on a free transfer and signed a one-year contract with Barcelona with an option for a second year.
What happened when Henrik Larsson's contract with Barcelona was over?
In December 2005, Henrik Larsson announced that at the end of his contract, which ended in July, he would leave Barcelona and return to Sweden to end his career.

Question: What was the injury?
Self-contained rewrite: What injury did Henrik Larsson get during his time with Barcelona?