For a club like Chelsea, performing well at the highest level is of paramount importance. The players must be able to give 100% performance every time they are on the pitch regardless of their age.Former manager Antonio Conte famously stated that he was not averse to playing young players as long as they proved themselves to be good enough.The same is true for older players. Club's don't mind using these players as long as they continue to produce the goods for them. A good example of that at Chelsea is Brazilian defender Thiago Silva who, even at 37, still has a starting berth secured at the club.Chelsea are one of the most successful English clubsChelsea have tasted a great amount of success in the 21st century, winning every trophy they have competed in. Much of this success has been brought by the club's older, more experienced players. The likes of Didier Drogba and John Terry are prime examples of this.On that note, here is a list of the five oldest goalscorers in Chelsea history.#5 Mal Donaghy (36 years, 5 months and 14 days)Mal Donaghy joined Chelsea in 1992Before the Blues came into money, the club was in the care of the Brits. Manager Ian Porterfield signed 35-year-old left-back Mal Donaghy from Manchester United in 1992 for a transfer fee of £100,000.Donaghy helped the club finish 11th in his debut season at Stamford Bridge in the first-ever Premier League season. He stayed on for one more season, helping the club reach the FA Cup final in 1993-94 where they lost to his former club Manchester United. He scored his last professional goal for the club in a 4-3 win over Tottenham Hotspur in February 1994.190five ⭐⭐@190FIVE_28 years ago today. Chelsea played Oldham Athletic at the Bridge - it ended in a 1-1 draw. Mal Donaghy, Robert Fleck, @Mickharford all made their debuts for the Blues.Harford scored the all important goal for the Chels in the 84th Minute. Who remembers this? #190FIVE #CFC08:57 AM · Aug 15, 202060628 years ago today. Chelsea played Oldham Athletic at the Bridge - it ended in a 1-1 draw. Mal Donaghy, Robert Fleck, @Mickharford all made their debuts for the Blues.Harford scored the all important goal for the Chels in the 84th Minute. Who remembers this? #190FIVE #CFC https://t.co/Bf4BpLw7OlDonaghy retired from football immediately after he left Stamford Bridge. The Northern Irishman had appeared in two World Cups for his country by the time he retired. He went into coaching after his playing career ended.#4 Gianfranco Zola (36 years, 9 months and 16 days)Gianfranco ZolaBefore the likes of Eden Hazard started to dazzle fans at Stamford Bridge, a certain Gianfranco Zola had done that over a decade earlier. The Italian joined Chelsea from Napoli, where he had understudied Diego Maradona.Zola joined the club aged 30 in 1996 and went on to establish himself as one of the club's greatest ever. He scored his final goal for the club on April 21, 2003 in a 4-1 win over Everton. Zola was so good that he was named FWA Player of the Season in his debut season despite playing only about half of it.Football Remind@FootballRemind#OnThisDay 1997Gianfranco Zola danced through the Manchester United defence to score this goal for Chelsea #CFC10:07 AM · Feb 22, 2022369#OnThisDay 1997Gianfranco Zola danced through the Manchester United defence to score this goal for Chelsea ⚽️ #CFChttps://t.co/HRMn5tQ651Zola left the club just before Roman Abramovich bought it. His contract at the club had expired and he moved to Cagliari. He returned to the club and served as assistant manager under Maurizio Sarri in 2018-19.