Bartomeu has praised Luis Suarez for the impact he has had on Barcelona following his £75m move from Liverpool two seasons ago.
"We are very happy with him," said Bartomeu. "We knew he was an incredible player and he has been better than expectations."
With fellow South Americans Lionel Messi and Neymar, Suarez has formed arguably the most potent strikeforce in world football.
"Right now, we are happy because we have the best players in the world," said Bartomeu.
"Messi is with us, Neymar is an incredible player of the future, but Suarez brought the balance to them. Together, this trident is incredible.
"The fans of Barcelona have never seen players do this."
Arsenal: Čech; Bellerín, Mertesacker, Koscielny, Monreal; Ramsey, Coquelin; Walcott, Özil, Sánchez; Giroud.
Out: Arteta (unspecified), Cazorla (knee), Gabriel (hamstring), Wilshere (calf/shin), Rosický (thigh)
Misses next match if booked: Özil, Giroud, Campbell
Barcelona: Ter Stegen; Dani Alves, Piqué, Mascherano, Alba; Rakitić, Busquets, Iniesta; Messi, Suárez, Neymar.
Out: Rafinha (knee), Arda Turan (suspended)
Misses next match if booked: Piqué
"We are very happy with him," said Bartomeu. "We knew he was an incredible player and he has been better than expectations."
With fellow South Americans Lionel Messi and Neymar, Suarez has formed arguably the most potent strikeforce in world football.
"Right now, we are happy because we have the best players in the world," said Bartomeu.
"Messi is with us, Neymar is an incredible player of the future, but Suarez brought the balance to them. Together, this trident is incredible.
"The fans of Barcelona have never seen players do this."
#- Arsenal's Arsène Wenger says Barcelona are "not far" from being perfect
- The Spanish side are 32 matches unbeaten, winning 13 of the last 14
- Wenger: "We must take our chances"
- Barcelona won in England at this stage of the competition in 2014 and 2015
- Lionel Messi has never scored past Petr Čech in six previous games
Arsenal: Čech; Bellerín, Mertesacker, Koscielny, Monreal; Ramsey, Coquelin; Walcott, Özil, Sánchez; Giroud.
Out: Arteta (unspecified), Cazorla (knee), Gabriel (hamstring), Wilshere (calf/shin), Rosický (thigh)
Misses next match if booked: Özil, Giroud, Campbell
Barcelona: Ter Stegen; Dani Alves, Piqué, Mascherano, Alba; Rakitić, Busquets, Iniesta; Messi, Suárez, Neymar.
Out: Rafinha (knee), Arda Turan (suspended)
Misses next match if booked: Piqué
Arsène Wenger, Arsenal manager
No team is perfect, but Barcelona are not far from it. We need to take our chances. We will have less of the ball than against Hull, but we have to make the most of it.
They have top strikers. Maybe they look like they are having a little bit less possession at the moment because they used to have Xavi in midfield. They have a team that can score at any moment. Even when they are being dominated they are still very dangerous. They did that in the final last year against Juventus when it was 1-1. They were suffering but they took their chances when they arrived.
I knew Luis Enrique as a player. He scored against us at Wembley in the Champions League. He has done a remarkable job because he arrived with scepticism around him and won the treble in his first year.
I remember we played the Champions League final against Barcelona in 2006 and Messi was injured for that game. It's remarkable that was ten years ago and what he has achieved in that time.
Luis Enrique, Barcelona coach
On paper this is one of the most attractive and appealing games if you like this kind of football. Arsenal are a good team, strong in the transition and with really good players up front. They will press high at times but I hope we can keep the ball in their half and impose our own game.
Being labelled favourites means nothing. We have to prove ourselves game after game and we are going to try to. If we get a good score tomorrow that would be fantastic, but we have a lot of confidence going into the second leg whatever happens.
I am delighted to have such a good front three, and also with the squad as a whole. They are all the chosen ones because they are fantastic. I’m absolutely delighted to be their manager. I just say 'abracadabra' and the magic sparks.
Did you know?
Barcelona have won their two previous two-legged knockout ties against Arsenal, in 2009/10 (6-3 aggregate) and 2010/11 (4-3), and also beat the Gunners 2-1 in the 2006 final at the Stade de France. Current coach Luis Enrique scored in both encounters in the 1999/2000 first group stage, finding the net in the 1-1 Camp Nou draw and again in a 4-2 win at Wembley.
No team is perfect, but Barcelona are not far from it. We need to take our chances. We will have less of the ball than against Hull, but we have to make the most of it.
They have top strikers. Maybe they look like they are having a little bit less possession at the moment because they used to have Xavi in midfield. They have a team that can score at any moment. Even when they are being dominated they are still very dangerous. They did that in the final last year against Juventus when it was 1-1. They were suffering but they took their chances when they arrived.
I knew Luis Enrique as a player. He scored against us at Wembley in the Champions League. He has done a remarkable job because he arrived with scepticism around him and won the treble in his first year.
I remember we played the Champions League final against Barcelona in 2006 and Messi was injured for that game. It's remarkable that was ten years ago and what he has achieved in that time.
Luis Enrique, Barcelona coach
On paper this is one of the most attractive and appealing games if you like this kind of football. Arsenal are a good team, strong in the transition and with really good players up front. They will press high at times but I hope we can keep the ball in their half and impose our own game.
Being labelled favourites means nothing. We have to prove ourselves game after game and we are going to try to. If we get a good score tomorrow that would be fantastic, but we have a lot of confidence going into the second leg whatever happens.
I am delighted to have such a good front three, and also with the squad as a whole. They are all the chosen ones because they are fantastic. I’m absolutely delighted to be their manager. I just say 'abracadabra' and the magic sparks.
Did you know?
Barcelona have won their two previous two-legged knockout ties against Arsenal, in 2009/10 (6-3 aggregate) and 2010/11 (4-3), and also beat the Gunners 2-1 in the 2006 final at the Stade de France. Current coach Luis Enrique scored in both encounters in the 1999/2000 first group stage, finding the net in the 1-1 Camp Nou draw and again in a 4-2 win at Wembley.