He meant the exclusion of Murray out of the "rest of the players" category.
Indeed, and here's why:
Tsonga - Beat Nadal AO 2008; beat Federer W 2011; beat Djokovic AO 2010. Only player to beat all the top 3.
Berdych - Never beat Nadal (and never will); beat Federer W 2010 and USO 2012; beat Djokovic W 2010.
Del Potro - Beat Federer and Nadal USO 2009 to take the title; never beat Djokovic.
Murray - Beat Nadal USO 2008 and AO 2010; never beat Federer or Djokovic.
Tsonga has beaten all the top 3; Del Potro and Berdych beat 2 in the same tournament back to back (Delpo actually won the title). Murray's credential against the elite (they have won 29 ouf of the last 30 Slams after all) at Slams doesn't compare, so there's no reason why he shouldn't be in the rest of the players, especially when we're talking about Slams.