Chelsea head coach Frank Lampard believes it is "pretty much impossible" to replace Eden Hazard with another individual.
Hazard starred during seven campaigns at Stamford Bridge, but made a close-season move to Real Madrid for a reported €100 million (£92.7m/$112m).
The Belgium international was directly involved in 31 Premier League goals (16 goals and 15 assists) during the 2018-19 season and his departure leaves a huge hole for Chelsea to fill.
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Lampard said Hazard – who won two Premier League titles and two Europa League crowns with Chelsea – could not be replaced by just one player.