Alaaeldin Mohamed El-Sayed Abouelkassem (Arabic: علاء الدين محمد السيد أبو القاسم; born 25 November 1990) is an Egyptian fencer who won a silver medal in the men's foil event at the 2012 Summer Olympics.

Growing up in Alexandria, he first became athletically involved in swimming and karate[2] before beginning his training in fencing aged eight in the city's Al-Selah Al-Sakandry club.

After successes in the sport at a young age, he was forced to give it up upon entering the Arab Academy for Science and Technology and Maritime Transport, as the program was too demanding for him to pursue engineering studies and fencing.

He earned his first World Cup medal as a senior, bronze, at the 2011 Fleuret de St-Petersbourg,[3] and captured gold at the 2011 Pan Arab Games in the individual and team foil events.

He had the same result against Peter Joppich of Germany and Andrea Cassarà of Italy in the round of 16 and quarterfinals, respectively, before moving on to defeat Choi Byung-Chul of South Korea 15–12 in the semi-finals.