Koeman says Messi has been the ideal captain and an example to the rest of the team for the way he has applied himself since deciding to stay at the club.
The first game of the new La Liga season between Granada and Athletic Bilbao set for Friday has been postponed by a day.
The pressure will be on Barcelona manager Quique Setién and his players who aim to get the three points to keep chasing the league leaders, Real Madrid.
Iago Aspas struck twice on his return from injury to earn Celta Vigo a crucial 3-2 win over Villarreal on Saturday, leaving them one point and one position behind their 17th-placed opponents in the La Liga standings.
Zinedine Zidane takes charge of his first game since making an astonishing return to Real Madrid on Saturday against Celta Vigo which is set to be a de facto audition for next season for many of the team's underperforming players.
Escriba was assistant coach at Getafe, Valencia, Benfica and Atletico Madrid, later becoming head coach at Elche who he led to the top flight.
With Messi the top scorer in Spain's top flight with 14 goals and Suarez joint-second on 11, only Sevilla, Levante and next opponents Celta Vigo have managed to score more than the deadly South American duo.
The 42-year-old Argentine has led the team to four wins in four games since replacing Julen Lopetegui at the helm of the European champions two weeks ago.
Atletico Madrid recovered from their defeat by Barcelona in last week's top-of-the-table clash by crushing Celta Vigo 3-0 at home in La Liga on Sunday to reduce the gap with the Catalans back down to eight points.
The first game in Vigo ended with a 1-1 draw. Barcelona opened the score by Arnaiz, while the equalizer came from Pione Sisto
Dembele played 20 minutes during Barcelona’s 1-1 away draw against Celta Vigo in the Spanish Cup on Thursday.
Real Madrid announced on Friday that the team captain, Sergio Ramos, has suffered an injury during the training session on Friday
Frank Rijkaard, former FC Barcelona coach, attended Barcelona’s match against Celta Vigo, recalls the good old times during an interview following the match.
Barcelona announced on Saturday that their French defender, Samuel Umtiti, will be out for eight weeks.
La Liga leaders Barcelona were held to a 2-2 home draw by Celta Vigo on Saturday.
Nolito will replace former Sevilla player Victor Vitolo who transferred earlier this month to Atletico Madrid.