Kris Boyd as the Celtic and Rangers favourites continued their on-air sparring session.Earlier, Boyd scoffed at Hartson questioning whether the Ibrox side will be able to handle the pressure of leading from the front in the Premiership title race.Steven Gerrard's side sit 16 clear of Celtic after both sides won on Saturday, with the Hoops also having played three games fewer than their rivals.Neil Lennon's side swept Hamilton aside after watching Rangers beat Hibs at Ibrox.Boyd admitted he