Del Potro defended his 2016 Stockholm Open title by defeating Grigor Dimitrov in the finals of the 2017 Stockholm Open. This victory gave Del Potro his 20th ATP career title. He then reached the final of Basel, where he faced Federer and again lost in three sets after winning the first. Del Potro then made it to the quarterfinals of the 2017 Paris Masters, where he was one win away from entering the Top 10 and qualifying for the 2017 ATP Finals, which would've been his first time since 2013 participating in the year-end tournament. However, he was defeated in three sets by John Isner and subsequently declined to be chosen as an alternate for the tournament, instead choosing to rest with his family and friends in his native Tandil. Nevertheless, Del Potro won 730 points in a span of three weeks and reached the 11th spot of the ATP Rankings.