In Sunderland's goalless draw with Aston Villa on Saturday he somehow scooped an effort over the crossbar from four yards.
Gus Poyet: "The aim for Giaccherini is to play at the World Cup for Italy so we need him to perform.
"If he performs well for us, easy he will be there.
"The key for us is he is the player we need. That's why we got him in the summer. That is why he is so important for us and we hope he can keep playing and performing.
"I try to say forget it (the miss) - it happens. The good thing for me is Giaccherini played for me for 90 minutes for the first time.
"He was good on the ball and moved well. He understood what he needed to do and helped the boys in defence which is perfect for him because he wants to play week in, week out."
PREMIER LEAGUE FIXTURES
Tuesday December 3
20:00 Crystal Palace v West Ham United
Wednesday December 4
19:45 Arsenal v Hull City
19:45 Liverpool v Norwich City
19:45 Man Utd v Everton
19:45 Southampton v Aston Villa
19:45 Stoke City v Cardiff City
19:45 Sunderland v Chelsea
19:45 Swansea City v Newcastle United
20:00 Fulham v Tottenham
20:00 West Brom v Manchester City
Sunderland Fixtures
Wednesday December 4
19:45 Premier League Sunderland v Chelsea
Saturday December 7
17:30 Premier League Sunderland v Tottenham
Saturday December 14
15:00 Premier League West Ham United v Sunderland
Tuesday December 17
19:45 League Cup - Qtr Sunderland v Chelsea
Saturday December 21
15:00 Premier League Sunderland v Norwich City
Thursday December 26
15:00 Premier League Everton v Sunderland
Saturday December 28
17:30 Premier League Cardiff City v Sunderland