Gerry McCann has arrived at a court in Lisbon saying that he wants justice for Madeleine.
He said: "I am here for Madeleine, for justice, for the twins and ourselves."
When he was asked whether he would be making statement in court, he replied: "I am not sure."
The mother of missing Madeleine McCann attended the start of the libel trial earlier this month against a former police chief in Portugal, to "stop the damage" she believes is being caused to the search for her daughter by his book.
Goncalo Amaral published a book making allegations about the disappearance of her daughter, three-year-old Madeleine, back in 2007.
Kate McCann said: "I'm here to stop the damage that has been caused and is still being caused, both directly and indirectly, to the search for our daughter."
ITV News understands that Gerry McCann, the father of missing Madeleine, is hoping to give evidence in the family's libel case against a former police detective in Portugal today.
Goncalo Amaral has published a book making allegations about the three-year-old's disappearance, which the McCanns say has poisoned public opinion in Portugal against the family and deterred search efforts.
The law in Portugal is thought to have changed in July, allowing complainants to now give evidence in libel cases. Gerry McCann's sister Trish Cameron is also likely to give evidence.
Scotland Yard has confirmed that Kate and Gerry McCann are not among the 38 people identified as "persons of interest".
The group that the McCanns were dining with in Praia da Luz on the night Madeleine went missing, are also not among the 38 people of interest.
Gerry McCann, father of missing Madeleine, has urged the Prime Minister to "do the right thing" and implement Lord Justice Leveson's recommendations in full.
ITV News correspondent Paul Davies reports:
Gerry McCann, the father of missing Madeleine, has told ITV News he would have liked Lord Justice Leveson's report "to have gone further" but added that he would be "disappointed" if the Prime Minister did not implement the recommendations in full.
Mr McCann told Paul Davies that MPs should be "given a free vote" and urged them to "do the right thing".
Here is a timeline of the key events since Madeleine McCann's disappearance.Read the full story ›