Britain's Alex Bogdanovic had some high-profile spectators as he went out of the Las Vegas Open with a 6-3 6-2 defeat by American Sam Querrey.
Agassi shares his wisdom with Gilbert, Murray and Lloyd
Las Vegas native Andre Agassi, his former coach Brad Gilbert, Andy Murray and John Lloyd watched as Querrey advanced to the 24-player round robin.
Agassi insisted on buying his own US$30 ticket, refusing free entrance.
As well as working with Murray, Gilbert has a wider coaching role with the LTA, while Lloyd is GB Davis Cup captain.
Elsewhere, Gustavo Kuerten saw off South Africa's Wesley Moodie 6-4 7-5.