Timeline: How Arsenal's Lemar deal fell apart, and Sanchez stayed put

The perils of procrastination came to the fore on Thursday.

Arsenal and Manchester City, instead of working throughout the summer to find a solution, waited until the final day of the transfer window to try to close a pair of conjoined deals, and in the end, each ended up walking away empty-handed.

Pep Guardiola's interest in Alexis Sanchez has long been established, but the Citizens didn't submit an official offer until Wednesday. When reports Thursday suggested an improved bid of £55 million plus another £5 million in add-ons was enough to close the deal, attention shifted to the Gunners - Arsenal, it was reported, would only green light the sale of the wantaway Chilean if a replacement was procured.

Enter Thomas Lemar.

A blitz for the French winger started Thursday, kicking off a wild few hours of action that saw the club agree to a mammoth fee, then drop out after being unable to reach personal terms with the player.

Related - Report: Arsenal runs out of time as €100M move for Lemar collapses

Here's how a madcap morning played out:

Arsenal, Manchester City reach Sanchez agreement:

That replacement was identified as Monaco's Lemar:

After reports suggested Arsenal tabled a gargantuan €100-million bid, it seemed things had been sorted:

That left some scratching their heads at the scattergun approach from the Gunners:

And then, it all fell apart:

Why the sudden change? The ever-reliable David Ornstein gave Arsenal supporters the cold, hard truth about Lemar's decision:

And here we are. Lemar remains at Monaco, and Sanchez will be playing out the final year of his deal in north London.