Question: Who is the league top scorer in the 1990-1991 U.C. Sampdoria season currently a commentator for?

Context paragraphs:
1990–91 U.C. Sampdoria season: U.C. Sampdoria won their first ever Serie A title, thanks to a remarkable season for a team playing on its absolute peak.  Gianluca Vialli was the league top scorer on 19 goals, and Roberto Mancini, Attilio Lombardo, goalkeeper Gianluca Pagliuca plus centre half Pietro Vierchowod were also instrumental in Sampdoria's success story.

ABA League Top Scorer: The ABA League Top Scorer, also known as the Adriatic League Top Scorer, is an award given to the Top Scorer of each season of the European regional Adriatic ABA League, which is the top-tier level professional basketball league for countries of the former Yugoslavia.  The award has been given since the 2001–02 ABA League season.

1985–86 U.C. Sampdoria season: U.C. Sampdoria fell short of repeating its successful 1984-85 season, ending up in 12th position in the league.  It did almost defend its cup title successfully, but despite a 2-1 victory in the first leg, it lost to Roma in the return leg.  Sampdoria's European adventure did not live up to expectations, it not even reaching the quarter finals of the Cup Winners' Cup.

1987–88 U.C. Sampdoria season: U.C. Sampdoria won its second cup trophy in just three years, defeating Torino in the final, thanks to a 3-2 aggregate victory.  Gianluca Vialli scored ten goals to become club top scorer, as Sampdoria finished fourth in the domestic league.

2004–05 U.C. Sampdoria season: U.C. Sampdoria enjoyed its best season since 1993–94, when the club finished third in Serie A and won Coppa Italia.  In 2004-05 Sampdoria was able to finish fifth in the standings, thanks to a robust defence and a goalscoring ace in secondary striker Francesco Flachi, who played the football of his life.  With only 29 goals conceded, the defence of Sampdoria was fully comparable with those of top sides Juventus and Milan, and coach Walter Novellino was hailed for the strong performance in the clubs' second season since its return to Serie A.

Gianluca Vialli: Gianluca Vialli (born 9 July 1964) is an Italian football manager and former footballer who played as a striker.  Since retiring, he has gone into management and punditry and is a commentator for Sky Sport Italia.

Amjad Radhi: Amjad Radhi Yousif Al-Janabi (Arabic: أمجد راضي يوسف الجنابي‎ ‎ ), (born 15 July 1990) is an Iraqi professional footballer who currently plays for Al-Quwa Al-Jawiya in the Iraqi Premier League.  He won the 2009–10 Iraqi Premier League and 2012–13 Iraqi Premier League top scorer awards, as well as the 2012 AFC Cup top scorer award.

1984–85 U.C. Sampdoria season: U.C. Sampdoria recorded its best league season since 1960-61, thanks to a fourth place-finish.  President Mantovani had surprised the football world by signing Liverpool stalwart Graeme Souness to the squad, and it paid off, with Souness adapting quickly to Italian football, also helping the team to win the 1985 edition of Coppa Italia, which was the first ever title for the club.  The defensive line, with Moreno Mannini, Pietro Vierchowod and Antonio Paganin among the crew, was the main reason for the success, Sampdoria conceding just 23 goals in 30 league matches played.  Quite a few of the players were still with the club when it finally won the league title in 1991.

2007–08 U.C. Sampdoria season: U.C. Sampdoria had a successful season in the domestic league, finishing in sixth place.  The club also captured Antonio Cassano from Real Madrid, with the notorious troublemaker settling in well at Sampdoria, helping the club to European qualification.  The season also saw the first Serie A derbies between Sampdoria and Genoa C.F.C. since 1995, with Sampdoria winning the second one with 1-0, following a goalless draw in the beginning of the league campaign.

Petar Divić: Petar Divić (Serbian Cyrillic: Петар Дивић ; born 11 July 1975) is a Serbian international football player.  Divić is the only player in Serbia who was the top scorer in the first three leagues – first league top scorer with 27 goals for OFK Beograd in 2000–01, second league top scorer for CSK Celarevo with 20 goals in 1998–99 and third league top scrorer for Dinamo Pančevo with 27 goals in 1995–96.

Supporting paragraphs: 1990–91 U.C. Sampdoria season Gianluca Vialli
Answer: Sky Sport Italia