As Whitesnake's style evolved in the mid to late 1980s, they began to draw unfavourable comparisons to Led Zeppelin. Tracks like "Slow an' Easy", "Still of the Night" and "Judgement Day" have been accused of copying Led Zeppelin, while David Coverdale has been accused of imitating singer Robert Plant. This comparison was exacerbated when Coverdale teamed up with Led Zeppelin guitarist Jimmy Page to release the album "Coverdale–Page" in 1993. In the press, Plant would refer to Coverdale as "David Cover-version". Coverdale denied any notion of plagiarism, stating: "I don't know how accurate the comparison is. People shouldn't forget that I worked in Deep Purple for a number of years, so my pedigree in hard rock is quite strong. I understand that bands like Whitesnake, Purple and Led Zeppelin all play a solid powerful brand of rock, but I don't think we're coming from the same place musically." Neil Murray laid some of the blame on John Kalodner, who he claimed began pushing Whitesnake in a more Led Zeppelin-like direction.