Eze, meanwhile, supplied the assist for Jake O’Brien’s (£4.0m) goal in the Eagles’ 2-1 loss to Colombian champions Millonarios FC.
The 25-year-old has now been involved in five pre-season goals, scoring once and assisting four.
Eze is also expected to be on penalties for Palace following the departure of Wilfried Zaha to Galatasaray.
Seagulls winger Adingra, who was loaned out last season to Belgian side Royale Union Saint-Gilloise, scored both their goals in their 2-0 Summer Series win against Brentford in Atlanta.
Goalkeeper Jason Steele (£4.5m) and midfielder Steven Alzate (£4.5m) supplied the assists for the Ivorian’s strikes.
Adingra’s display followed Joao Pedro’s (£5.5m) goal and assist against Chelsea in Brighton’s previous match, highlighting the wealth of attacking options at Roberto De Zerbi’s disposal.
Diaby enjoyed a dream debut for Villa, emerging from the bench to score his side’s second in their 2-0 Summer Series victory over Fulham in Orlando.
The winger was a huge success in the last two Bundesliga campaigns for Bayer Leverkusen, producing 22 goals and 20 assists in 65 appearances.
In defence, Emery has paired Pau Torres (£4.5m) and Diego Carlos (both £4.5m) together at centre-back in each of the last two matches.
The duo both started against the Cottagers, having previously appeared as second-half substitutes in a 3-3 draw with Newcastle.
Lucas Digne and Ezri Konsa (both £4.5m), meanwhile, have also started the last two in the back four.
Digne, who is currently profiting from a run of starts due to an injury to Villa’s first-choice left-back Alex Moreno (£5.0m), supplied the assist for Jaden Philogene-Bidace's (£4.5m) opener.
Having started alongside Tyrone Mings (£4.5m) at centre-back in the Newcastle match, the versatile Konsa featured at right-back against Fulham, replacing Matty Cash (£4.5m) in the XI.