Andre Agassi has attracted as many camera lenses as Novak Djokovic in the opening days of this year's French Open, but the question remains whether this is a fleeting glimpse or the long-term return of one of the game's greats.
The 47-year-old Las Vegan began working with Djokovic via phone calls to Madrid and Rome last month, and took up coaching duties in person last week in Paris.
There is no clear idea yet of how long the relationship will last.
"That's a question for him, to be honest," was all Djokovic would say on the subject before the tournament.