Neymar was touched by the sight of Luis Suarez in tears after helping Atletico Madrid clinch the LaLiga title.
Their Barcelona bond remains, even though both have left Camp Nou, where alongside Lionel Messi they formed the famous 'MSN' strike trio.
On Sunday, Neymar was hoping to help Paris Saint-Germain win the Ligue 1 title, as they looked to overhaul leaders Lille on the final day.
But the Brazilian was also caught up in the drama of Saturday's finale to the Spanish LaLiga season, as Atletico pipped Real Madrid to glory.
Suarez, who made a painful exit from Barcelona last September, scored 21 goals in 32 league games as Atletico broke up the familiar Madrid-Barcelona duopoly.
His goals were worth a total of 22 points to Atleti, more than any other player in LaLiga this season.
The 33-year-old let his emotions flow after scoring the decisive goal in the final-day 2-1 win over Real Valladolid, breaking down at full-time while on a video call to his family.
It was that moment that tugged at the heartstrings of Neymar, who alongside a picture of the weeping striker wrote a message on his Instagram story: "Well done @luissuarez. I'm happy for you brother. You deserve it. You're a star."
England international Kieran Trippier revelled in winning the championship in just his second year in LaLiga.
Trippier wrote on Instagram: "CAMPEONESSSS! Wow, what a feeling! To win @laliga with this incredible group of players is a dream come true. Thank you to everyone who has supported me this year. Vamos!!"