Cristiano Ronaldo is on course to make his second Manchester United debut against Newcastle on Saturday - but what does the Portuguese forward's story at Old Trafford look like so far? The 36-year-old forward made a sensational return to the club where he made a name for himself last month in a $27.4 million (£19.8million) move from Juventus - 12 years after he left the Premier League giants in a then-world-record £80million to Real Madrid. Today, Ronaldo cuts a very different figure to the one that first arrived on English shores in 2003. His training images from this week show off a toned veteran who has traveled the world and won everything there is to win at Europe's elite level. With the Premier League waiting for the return of arguably its greatest ever player, Sportsmail goes through the archives to look back on Ronaldo's first spell at United...

Cristiano Ronaldo first caught Man United's eye when he bamboozled their defense in a friendly for Sporting Lisbon in 2003.

Manchester United manager Sir Alex Ferguson (left) signed the skinny teen almost immediately after that summer.

Ronaldo was handed United's iconic No 7 shirt worn by the likes of club legends David Beckham and Eric Cantona beforehand.

Ronaldo's first spell at Old Trafford was nothing short of memorable. The skinny lad from Madeira turned into the world's best player in the space of half a decade, winning Premier League titles, European and world trophies along with individual honors such as the Ballon D'Or - all in emphatic and glorious fashion.

Ronaldo's first Man United goal came via a free-kick against Portsmouth at Old Trafford - the first of many memorable strikes.

The Portuguese's slender frame wasn't helped by the baggy kit he wore for the Red Devils in his debut 2003-04 campaign.

Ronaldo lifted his first trophy for the club in his debut season at Man United - scoring in the 3-0 FA Cup final win over Millwall.

Ronaldo showed he could cut it at the biggest stage by scoring twice in the 4-2 victory at then-champions Arsenal in 2004-05.

It was not all plain sailing for the Portuguese wonder kid at Old Trafford. It took his United side three years to wrestle the Premier League title away from Arsenal and Chelsea, and then there was the 2006 fallout with teammate Wayne Rooney after the pair clashed at the 2006 World Cup.

Portuguese winger Ronaldo lifted his first Premier League title in 2007, just as his physique was starting to bulk out.

The 2007-08 season saw Ronaldo truly hit his strides as he led United to Premier League and Champions League glory.

Ronaldo netted another memorable free-kick against Portsmouth in 2008 - one of the best set-piece goals England has seen.

The winger netted the first of many Champions League final goals in 2008 - earning United the lead over Chelsea in Moscow. But Ronaldo missed a penalty in the 2008 shootout win.

He bounced back to add the Club World Cup to his Champions League title.

Ronaldo also won individual honors during his time at Old Trafford...

Most notably, the Ballon D'Or and FIFA Player of the Year back in 2008. Lionel Messi has won the honor six times, beating Ronaldo by just one award.

Ronaldo added two more Premier League titles to his name in 2008 and 2009, scoring 49 league goals in those two seasons.

The final game of Ronaldo's first spell at United was the disappointing 2-0 Champions League final loss to Barcelona in 2009.

Ronaldo completed a record £80m move to Real Madrid, scoring on his Old Trafford return in 2013 Champions League victory.

In 2018, Ronaldo joined Juventus for a £100m fee also scoring against United in the Champions League later that year.

Ronaldo is now back at Old Trafford after sealing a £19.8m move from Juventus, 12 years after he left United back in 2009.

Ronaldo is back training at Carrington and is set to make his second United debut this Saturday against Newcastle United.