The shooting guard has been one of his country's best players in recent seasons but he put their quarter-final place in jeopardy at the end of the bizarre game against Italy on Sunday.
The 26-year-old Macijauskas, 26, with less than a second remaining fouled Gianluca Basile behind the three-point arc, giving the Italians a chance to tie the game and send it to overtime.
Basile missed all three free-throws and the Lithuanians advanced to the last eight.
Italy were difficult opponents and Spain should be even harder opposition judging from their success this summer as they have yet to lose a game.

Macijauskas will relish the challenge as he used to play for ACB side Tau Ceramica and is used to playing against some members of Tuesday's rivals.

"It's going to be a very interesting game," said Macijauskas. "Spain are one of the best teams in the tournament and they will hope to win a medal but we're not bad either and we will make it tough for them.

"Spain play real nice, together, as a team. They have a great point guard in Jose Manuel Calderon and good post players. So they will be tough to guard.

"I think the key will be defense, all the big games are won on defense. We have to be more aggressive and try to slow them down."

Macijauskas says he has not felt additional pressure with star player Sarunas Jasikevicius
unavailable for national team duty in Japan.
" I don't feel more pressure," he said. "I'm just going to play my best and my team-mates will do the same."
Spain coach Pepu Hernandez is a great admirer of Lithuanian basketball and the players it has produced over the years.
He knows that if his team is not fully focused, the Baltic giants will give them a basketball lesson.
"Lithuania is a team that has a lot of basketball tradition," he said." They have a lot of potential, they are very strong, very physical and with great players. It's going to be another big hurdle for us to clear.
"I'm not surprrised that they beat Italy because they have a lot of potential."

What has to be encouraging for Hernandez is the form Spain have shown in the build-up to Japan and the games they have played since arriving for Group B clashes against Germany, New Zealand, Panama, Japan and Angola.

Serbia & Montenegro were brushed aside by the Spaniards on Saturday night after an excellent start by Calderon - Macijauskas' former backcourt partner at Tau.

Calderon looks like a much stronger player than one season ago when Spain reached the semi-finals of the EuroBasket.

He is central for Spain being able to quicken the pace of games.

"We must continue to play our game," said Hernandez. "We have to defend to the limit, be more aggressive, maintain the intensity, get the rebound and run.

"If we run it's difficult for anyone to stop us."

Spain, who have lost eight of their 15 official encounters against Lithuania, also have the added incentive to win as Lithuania beat them in the EuroBasket 2003 final in Sweden.