While collecting his 2000 BRIT Award who did Robbie invite to take part in a televised boxing match with him following a war on words?

Explanation

Robbie Williams has won several awards throughout his successful solo career. This includes more BRIT Awards than any other artist in music history, a record breaking 18 until 2020. He has also received more ECHO Awards than any other artist ever, a record of 13 until 2020. In 2006 he entered the Guinness Book of World Records for selling 1.6 million tickets of his "Close Encounters Tour" in just a single day.