Yes, definitely. The original term was coined because Fedalovic and Murray were the ones winning the Slams or at least getting to the finals. Murray is out of the equation now and Djokovic has triumphantly returned. If Del Potro can win his 2nd Slam on Sunday that will certainly seal it. This, of course, is different from assessing the Big 4 in terms of overall achievement.If Delpo wins USO, can we say we have new Big 4 because they won one major each in 2018? I know Delpo is not at the same level as Murray in terms of achievement, but is he in the top tier at the moment?
2015-16 was quite clearly Djokovic and Murray - no idea why you've stretched it to include Nadal in his worst years.The truth of the matter is that there never was such a thing as the big 4.
From 2005-2010 it was the Big 2 (Nadal and Federer)
From 2011-2016 it was the Big 2 (Nadal and Djokovic)
From 2017-present it's the Big 3 (Nadal and Federer and Djokovic)
Forgot about Nadal's poor form there, but Murray only won one slam in that period. Wawrinka won two.2015-16 was quite clearly Djokovic and Murray - no idea why you've stretched it to include Nadal in his worst years.